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 0x5305d511908edd44bc9739b16be094bba125da19468d662aecfd5d9d8ac78a66. 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/cea83cde-5282-48e0-a320-b62a37a64709.json and https://artists.proofprofile.net/proofs/artist/cea83cde-5282-48e0-a320-b62a37a64709.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 0x37e8e4c5bf4c09790856b225505c063e6f1d3f1061213f51822a49cc08edb1e5. 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/FRX872459452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a27a5c52949322a8898d12d17811f755551803ef4fb3b8e6fd7c4ebb86cc783. 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/FRX282433079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3ea5f8099dbc010dcd7bf0182854bb0484a91da6c9ffa1562fda7df3279cf50. 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/DGA0H2338136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ecf226ae8857a03e7c849a2fbc6c846343752b816aa8ca008f4401ad6da2d5d. 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/ROMGM2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3253c8b0961ccf7e32cdf474c147237de506623dcf39625900726a841f4509bc. 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/FRX872378308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13d1ea2cc0e4420008b093f0aab608aba38f196987cddc8389a8a602a78c6c61. 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/FRX282315964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e4b43d79fa37c46df9d92ce71422b7ff12717056fd3f26654c89c96dbec71f8. 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/FR59R2320567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9ed685130812349203de0fcb50d11f04044af9674e5229eefb4ef322390ed04. 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/ROTHR2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdef0e3810d199f20481a44197aefbf480e83c03ceb6baa27b5d3be329e11e76. 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/ROTHR2200023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9b384cc0fa8b828285aa2b4d2677816cb329c678670e577bf0a7b53ba2d0112. 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/FRX762266166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca58273fc149a542f20638a4088a6e4532e4dd09a14a796db58e116f7072575a. 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/ROTHR2200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x426b389d92d4b6a9f5130d9668ee015b485765ed8bdf1012112b6c360a2e1de9. 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/FR2X42272506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14b730b3d7583cfe70facd1bcb24242163a5d6034c3085957bff302460ffb1c3. 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/ROTHR2200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x543e1d43ef7789f316ce2422e473f8b50573b8aa32a7ab9add46fb3352355165. 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/FRX452154660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69fac985649bc8b07bfa146a19e217de1a589b8850f7624f68ec45b80bc7ae93. 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/ROTHR2100124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa002f85ba9667abc668796291775037a654da695d6d6506c11990903318fe0a6. 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/QZ5AB2194168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5481d0c33455efb4e8830fa63c35ae05aa429dd5905e5d94e545a534f041a5a5. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZHZ62074780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7171ac86f3161bcf53849fb1de3991cc8f55c694818e23ce538a8637cbbd6562. 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/QZGLM2089840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb488f5053524218321bc9fbaad09a0175ba31f693d53add2ecd2a91397f397c1. 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/FRX281933542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7c40dbac05844ab583dd51ecb944e9caa2afc43eb9b42d2fced6c07612a0212. 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/FRX201913269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19e4ad09d2314005ca3b152976e6cbe90ae648cc5f2cb1efa9ac4dce20aa7cc4. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-16T14:06:25Z), 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/USHM81922954.