1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x807cf5553fff858b570f689c4fc96a09621a799fcb357fd6783fc8a30bb6fc34. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4d97b494-ea26-4e8c-ac8e-28b37f3a9b91.json and https://artists.proofprofile.net/proofs/artist/4d97b494-ea26-4e8c-ac8e-28b37f3a9b91.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9c4511491dd01cfc68bf5254ecbdcfe2d4d57ff5c2992851ea96b0c7f16de24. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEH742036974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc7f295b8ddaab64b1c9082fb724a758b2ba2a7c7be0b771a7c82a09d4794e1a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BKSAI2400125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4765df2f580e825f35a6f90a2392480f17a2ad699dc7efe672d7702c46895b86. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNJX2484001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb955e723c193de78aa1a3b02889b0252503409e6d3f69c1d4014ac04ce548503. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BKSAI2400124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef06a62e9ca8a1dece173c1c0af9576b92b7da14a727dc904f436bebbf10f143. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BKSAI2400017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53414b52bfad29f0b9fb91d0df25cf76d349b1787be386b45934201b6367abd1. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BKSAI2400032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaee1a736fec515898030566f577c23b40bf51e65f1ec8382986916d3453bb3f5. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BKSAI2400031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d7bc6f989793c02bb3a9f181edd52301ab4299845ff2c575bd977a083fd9e70. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BKSAI2400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7175ddfdb47d53220208d6cd25b169ebfa3e56f0da6170be121067cefb1edc11. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BKSAI2400196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a520346a53b0b1d28667a143f14e4326870076c3690a2775a00393091c03f55. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BKSAI2400149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd15bc19945d5e666aa81e78095fc581bf906aeca2dc6f5a6a1c795d0ff5195a8. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BKSAI2400122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f46ca3eba5c7bb0cd1b225a2b10238c9e7f37ad94e552934d723b416a7a8f09. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BKSAI2400058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34ce4fae5c3fa687b24d9a3c02400a9d08c8815f821912a5e14890e8252dd6c5. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BKWDJ2500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42266d89fdb11ad584b9d7c459026bc834cbe7990394d6aff34f54131cf5bcc7. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BKSAI2500013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf38e71043289af12548f45cdf5eb19770ef0a99a4765c5af2fb5bda09b1985f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BKSAI2500011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x994350154f7efa99b1a341dc8abd96972bb3355d7fa60f25845a36b153c67fdd. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BKSAI2400214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8a6ac8b59971f505d82cdcb8ce7016f2bb0e594f6d8b0e54d8926c6ce6652c1. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BKSAI2400226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa218f73aef4fd11320b94710a1dc6d624ab1d1de73bd709bb3d1a3f698183596. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BKSAI2400205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5b5418d4b4890439e7308fdb79963941505218858ac4f3b1590cf616cb9d57e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BRUM72402887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb6772f7e08737f4122a2eb1eede6b2e50b0dee33a9f0e93e81a8f9c310a0b63. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BKSAI2400206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7d9785a753b766922a4f0f241ce4da46f04da7f420fd0378f511bc01396cc6e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BKSAI2400169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c70c21aeae585cb041a10f30607d45f2839073bbe10f5c9c31dd2c2b5208ab9. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BKSAI2400173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5385d05f7f9f850eea2eb91f4a01b846e5a3bab4aea3cfea9288c5e881075cd5. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BKSAI2400158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3389b4d24cedbf128aef9535b7b7a18e83ecf5b796a200c650f66e2caa6687ee. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GXBAV2277901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8684001bb24a2b5d44d57b13d002ca11a04555808a6bc39731fe20c4dcbfb1a0. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BCX5F2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabbf28a777ac231c86ade35f19eecd6f937072e5a1d4a377a6686d74587c87aa. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BKSAI2400101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x234b4f36aa4d911bce9294160282883dde7eb2bdd1e629d3dd695a1fa387648e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BKSAI2400083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ff6c55fd5b2e683c7d375bf0558370fc61ba6cc6a94bf97f81d22cc3898c792. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BKSAI2400087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x727b73e3fbd447024f832c07462bc7332eb92f8bd1854d1e4db504d7271a223f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BKSAI2400092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x856d7a6a14a5b954bc7ca43c4d2193245235adcd7e4c8291ba3a655e97d52e28. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BKSAI2400082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd589297ace6c1b288e7806664058431940d180609ed61c2e5571325ac3eaf6a. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BKSAI2400098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab386a40fa53b9fee93c7fabc79cdce57d33de628e254bdf59334fcbf42a748b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZGLM2459186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bc6bf1b489a47ee367e11ef6e266acc6263c017a56db9cebf466fdf72b31e19. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZGLM2412955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0683cc362b95f4af5656d591e68f8664d834855211c285c08f53071693aeed59. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTRX2374995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2831d45e249c7ee9c847c1eec5c67fa928da331a6d5c3461a7b8ec97126d93ff. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BXHBP1900729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36c33f8058f2c2aa5e49cbdd7cbc64196be09d352b40f8c3b958a56bfe68bcde. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BXHBP1900730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbd4e501403cb3bf03ccd5eea1d22d7a87ef21b1ecde0a5712e7238163707651. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BX8QF2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0940a85fd932aea16f58eb2e02b125ab7e45c4a73da35f9a0dca20f3f12fe1ca. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BX8QF2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b7cdee7bbd5545f215916d5236c2be2db86c9c9a5ac0d147f4b6fdfa7a82ba3. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLZ8W2100136.
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb540b59f9adedcd9ddc3c5274164b7c30539ce850b34c9a7e2d2b0060996a64b. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM4TW2294516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x759125e00ce5b66ec22153cccd1e7c7755037c37bfec196003fd67c48a788bfa. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BX8QF2300006.