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 0x1938dbff00224d420ee08fe00dccb222be91443e64fe56888498876000f347d7. 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/349bae5a-22ec-4650-91dc-1ba9ee0a41f9.json and https://artists.proofprofile.net/proofs/artist/349bae5a-22ec-4650-91dc-1ba9ee0a41f9.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 0xf40a0c406daafe1ef11159df807183b325ef1793fb9343db86db659fe17256e7. 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/QMFMF2438784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cc2daa9a51461a3e93c782c42605a9d1b755c9cc4e548dc7f4f371edacbcdac. 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/DELV42300988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e5f47339daf81bc2b85e3023f5c7817f82b4320c0d7a00e1d6b770cdabd0fa5. 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/DELV42300990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19cc34222629666e543405c1e0f17e47259684c737a57a7613227d1a1a9fc143. 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/DELV42300992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x573fa785d9d5ed588566f8d6faf38752ef2c856c04d28286ad201b3f28e6b8ad. 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/DELV42300998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0da5b671037d42c4d2e2eedb50be33b8340966b7bb4a3e395c203372c5e25d55. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/DELV42301002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89048bb6b81e1c7309b105fe2ad8a4a5f1c9d4bd801ec22ccdccbb4d89ed22f9. 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/US23A1555112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5906bcfb041d49261f89aa9444dc2fa7d03c3fea998514535d1c1ae24de7d0b. 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/US23A1545387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d00861f178bb1b5f16ba649651fd9fc961284e2df57ebee029bd93314d3ea7d. 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/US23A1545392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2754d413c7bd2a64828678bd8d6933bbaf75c0f0404e9c7133fe5c5bee3d565. 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/SE5ZV2110701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea970f454f3b474fde90ee6f9309261e930b4dfd0a162ef1890807386bba6c5a. 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/SE5ZV2110706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd52d31e5a4238c07c87c43a4ac77e250d7307de5a2c3d1656606c5ff5da69b78. 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/SE5ZV2110710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3b95988525c6595d98c45b3565cb2b4f7707e940c5decd83e4a34a7369242f3. 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/SE5ZV2104201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe03f09fc995d8e0fba459f6d11a8129f882d4728ffff0b27ad77c7968b6fc2ff. 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/SE5ZV2104401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd897eb3d32424b35f4f32ec07033f121a3e5176d22f36de3b682789a2e34650. 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/QZK6N1994706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64a69cc2eec0aaf3d7d75e8ea7487acd61273a439e70e14752e1cf663e19056e. 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/QZK6N1994708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aed2db8b7c5dc77455e3c31e5917e557cbc8ac2aa5b877a989e2981ba678428. 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/QZK6N1994709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefd7966f81397b249da430b729f33196c4206b125a0144d40a773b6eb8ef68c9. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QZK6N1994711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07ea5bd9efab824366d17008c6d4bf6d7f5bf641872cbae7bf495eadba50eb76. 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/QZK6N1994712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2afd9e14187bb23b6ed5eb81aa2106944d189e6d627ed449c2a9f12573aabe4b. 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/QZK6N1994713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ed694c09dd40bd056c5d490a6245894e919342b94834e36a2c6bc7f6eae944f. 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/QZK6N1994714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a74ea2e6574136dccf1767f3594539be43cd8d3668a597151e60a67fda8f0db. 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/QZK6N1994720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdc2cb8b93d4e8879714b9130dc3fe0aa7b577c20aae40be827e6f6afd329ad0. 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/USA2P1633318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce7765c040f17feaada9a849454eed192f84f11ce3e8ad6d0176dd000347ec0b. 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/USA2P1633324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbf7ac94457e38bb375acd03a4e6fe4ba5b939b86b8985368debd44825ca40e1. 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/USQY51549405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbabf37c8120a87a62e413fed630f8696b555b4a43c768a639496e9704b3121a2. 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/USQY51549414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf67e0776ec5ffb32f6a4a687c652cf6076c0d870bfecde9108b58cf333ed0a5e. 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/USQY51549419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa24fc2d620e5e378c874590a76f83713076444e1b3b059f67e95d3887ba5cfe2. 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/QM4TW2561547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa59ecedbf1507fd8615de46d0d4f24e48f8dc7de9db6bb0b0c4ae34a9f74d341. 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/QMBZ92462004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e5f47339daf81bc2b85e3023f5c7817f82b4320c0d7a00e1d6b770cdabd0fa5. 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/DELV42300990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2f4f7274ffafc46fb44a6c4fc377b6a6e408a80421f360b71e7129f3d94b5e4. 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/AUMEV2420837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9941c86ec4dbf0cbbbca8f84f05b26cef6a76af869c37eb533c6c65c0d748f92. 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/QM4TW2453823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d00861f178bb1b5f16ba649651fd9fc961284e2df57ebee029bd93314d3ea7d. 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/US23A1545392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea970f454f3b474fde90ee6f9309261e930b4dfd0a162ef1890807386bba6c5a. 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/SE5ZV2110706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x092a670b3b01fd2e8ecc2f5749b9248207b38bce3cd9f7dd3c0becf8e7c57ad3. 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/QMDA72538206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaee3ca53dace0fc282f3e6f5903a0021b56200b1c4559d167ff118028f9e8e0a. 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/TCAFF2009126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8c57e0b20a22cf377f4862c19f31b40662db326a703e2b82a530c346ac232f4. 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/NLRD52018614.