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 0x88cd45cf3b4bde49c3526e7d6564879d53899218684a16fe4cd7a7fc2fc6d762. 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/c7b7d000-8257-4cba-8af8-4514215b7ebe.json and https://artists.proofprofile.net/proofs/artist/c7b7d000-8257-4cba-8af8-4514215b7ebe.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 0xcb919720465babcb9b21bbc7602b728144fa5c0fab6768f51a9baf9a7e7c1246. 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/INS172400137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb0e35ddcab1816b2aabb9f71a1e2a5d2f84d5c278c69a4bac0bd9c99e1ceed5. 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/INS172400131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf902dc9ab9a127930055493a012b83617c93eb1a36111b4978844aa72b3b80d. 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/DGA0L2387332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a73662ade55ed35c91c286654537c2ee105bae4e0d98adca4c68bf095f90a66. 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/INS172308967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe658008b25cd6b0fcab0ea33d58f0a5c74701d31ad035114ea99984c401a885e. 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/INS182301318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67ea2eae33d04c999fbeda10dc3ee1dd7617c3cc7bcfad17343cf63cbfaa75c3. 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/INS172307325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4f4ac3b204dacdc0bd1a320e197882df0158883675ea943b22cd79d2316ff91. 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/INS172306667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67be002f555484cc06c03e09bb65f488bdcb1b8985c826933720324de969e242. 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/INS182300616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x843cf53a68898a07f5e5b7d48c0d66dcdd196ac97fdacd9e3cf83ff0f51c5df4. 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/INS172300667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa486e8ee6950b72565143afb53866a6b829153105910915c20045ead3ac69fa. 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/INS172222652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd67cff807cb4c87cda14350ae3fe7b1971d4c8de0b60df6b8a9c1adc1ad113f. 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/INB720000039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b1bcc32eff100c3bb15ac3e2ab58c40fd3462c0eca57b33317d5e4f4144b2cc. 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/INB720000036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeedf0f5f95a2368876b3fd06d1246377985ec70522598428ac4cffc642f73fb. 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/INT762200178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2888f1884bf4d6a7247b50c97007b48492f6612b356b5746062fbcbcbd8feb63. 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/CA5KR1843494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10eb5de6d28e91949d4862b7c6275e484847d7d874dca00e6be99208fcceb539. 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/CA5KR1705248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15436e5fa7918db09f85bdd1241d3d782e72d2a9a0b490c86a8ed81f35b613f4. 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/CA5KR1843495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde8be999cd683ebf3defa562d505614b9353fbb25f1ffa58b65547faa62774a0. 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/IND712010244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x347f60f5532f7cc9945cd3acd0a5bce4a8ff15bb56ce8250a604a986f894f5e7. 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/QZHNC1979113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed92170b8e0863c93ef0acd9f28151f58b45872c43035f23866834b83dd5d3e0. 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/QZES51907275.