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 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 0xc6e691cf058edfef247a862e9aed0b2b4da9141fe8ed5cde668da9f3e80781a1. 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/5f810ccb-8658-48b2-ac03-fd43c91ee9e2.json and https://artists.proofprofile.net/proofs/artist/5f810ccb-8658-48b2-ac03-fd43c91ee9e2.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 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 0xa60412b66d68c4ca28928573f3ee3f56c406ec2e6daa372a07b8241c7f3daaa4. 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/QZGLS2473666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2987d7f940c58b81b5c136d3cadc644ef1759851eeb5f53e03073d2d0483281. 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/BC7V52400017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e5ada2c78091b4d571c07bd3e894ace329306063f79137995aefe784d54cea3. 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/BCZ6P2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5b9e1bfde8e66b07ae00bf403ea51396f33ee6792b6cb8ee740ddb6558eaf0e. 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/QZWV32395332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16943476a608c064ce0d37cacfafbd5c1888115a31d420533d36c2923a4644d7. 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/QZTV32396602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2ca078a04b23e78529b7cc4d850c578895c208a2462cb1a6f8fbd2c7a898299. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QZNJV2342506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75e7ed94c1f6312b8a69061440070cd29f225914a3707fe4ef7ebdcb906d6e1a. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/USLZJ2357190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52b55566935968a612db6f1168f3a65bda74cdbbd9644dd447904ef9aece6f6f. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZ5AB2399565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x904fef18dffe819045bf272ea70f22bb78326e33c0e1ae9746aea8c7367736c4. 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/QZ5FN2376515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b71208eb104c6c72a5a323c81757d1911f1a05f73013a5a0775ff3a3c82ef80. 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/SE62M2234308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6773dc0dd3ad2ca2598edc34e971a4aa3123c061d9f7d986ff83d0a7a7043435. 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/BRRGE2300565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b7c12b8f1962f36863fba620227827d0e0a657ed7bced880264873d41e325ea. 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/BRRGE2300567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11e4ae454a18733bb59eb2125beff2b31d5ee4307a46dd4b57a7388d79e8b246. 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/BRRGE2300569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3864ea085bc1f30fc74a4adc9355a3da6df28e48468bdd997f6be198deb46487. 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/BRRGE2300571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0555267e78e3eabed64cb125db77d0703af20ec6c20ce00825533f09b7d415a. 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/BRRGE2300573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3797fc7c45a942c931d7a97590f70c87b4aa13b7117ea44f3000fd978cd8a669. 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/BRRGE2300575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde715839301a4f5df023e0263f25aeff6032785c167a95dd6c442c1ac49eee54. 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/BRRGE2300469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39609013c9338221d2cd043e882dec9a2c9b9fcd4c184be0e0c3e2cdba3b571d. 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/BRRGE2300579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c871607c1955dc33d385bc295609319ee55e3efa6a68f608d40fb7dd228711a. 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/BRRGE2300581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x446071ef40a8e29d59a4a851f4cc4596ffce8896098a96eb72cfb8a1abdf5af3. 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/BRRGE2300583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x030a49080035b690e6941a09cef76436eeacdb3dfb78583070d9889a51be91cc. 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/BRRGE2300585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53cb521bea1285033e17695d03d2d050677613b4bd1a2f628b49f67f67913ab7. 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/BRRGE2300587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb32abe6f5ba6b81b0b1218f6e5d881be61cd809c011aad153c68fc5f482c0cf0. 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/BRRGE2300589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc229dd55a8cf0ccf8515b72c03d47d169725627710b3cb79345f3af204f39cb1. 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/BRRGE2300591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86d6bac256ca7b5e7ca66115f89f8637676efac90baf60f1eb673c93e69b8495. Chain 2 (Bitcoin): anchored in block 957011 (2026-07-07T08:25:35Z), 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/QZGLM2394136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ad5f16249177b7996139243eb98c08df99494353fdb79ee2258899b2678705e. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZGLM2394137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a117f4d92f3f49ae7f7b3cc43fce8b8bf617d9370fcf32944fd1a0582a1b9a3. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZGLM2394138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f02d598bbe4ffe01466bfd2759b3a51b4b0938084c3e7a0cbba1fa3bfe4f0b8. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZGLM2394139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59a277e4b9025d7d6518eacb7258ccac7823b268f26fdbe5d33144966dbcf145. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/QZGLM2394140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b648b0921c5e4ce9ffc59e9cbba4fe0afa10cbcf29b4d9499aab0cdb8fb0545. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/QZGLM2394141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb3ed2cefb66f5d62122e891243f0aa01e8d52e87766a95a41aad015d5d823e1. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/QZGLM2394142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf21ac50f254930425eecb862b8bc7dd25396de814f5d590b773d256962a4f1bf. 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/QZGLM2394143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53b73d80589149935f48a3dbd3c30b06202ea48d6ab27eacb69a507d1d05191d. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/QZGLM2394144.