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 0xf9b38434e47d57245438342b42e6a196f57f058289b168f5a665b03aa05100ce. 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/ee80745d-385d-45d0-a0db-1fd3f5ae9c17.json and https://artists.proofprofile.net/proofs/artist/ee80745d-385d-45d0-a0db-1fd3f5ae9c17.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 0xf8e4257a3da5a7a765532def213e7b550218d37fda7ac79350338a231354d344. 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/DELJ81506626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3da7ab910af9344ff17b7075fd67781badbac3f84de99e43ee7e946faf1493f4. 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/DELJ81506627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81368fee5f13042d7b88f4f1a1107386001f9d23b5a7006804b04dadb3191700. 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/DELJ81506628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d890e94e6c67e7265d33eeab6aee891ff3e82a34206dfd296ad70e99afbe341. 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/DELJ81506629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb960ee0d76b24a18b6c523b8c4c38dcdd4cbfa210caa869153a4cf3b37e563a. 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/DELJ81506630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81e5fa16167aeda4fe2bf7513801f5417911b3d80220ab05333b7e196aa5a6d2. 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/DELJ81506632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb6b7f9339bc432cbb7e19edf0583c13b1de6fa1e16ade86b27e6629a4ee7155. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DELJ81506633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3535514eea230f9d6a4d80b9b2efa755fc321955295cc03970fb06537e71a02. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DELJ81506634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d1cda6cc53c822a8315e8872c7373691ae0a378fad7decd15570e4899f98373. 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/DELJ81506635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7b8df5c8109bd553af897f768e33e3c8bbbf87d5e60b84b98ca73fab0fa4f4d. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DELJ81506638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcc0575cbac0d6ab5755bcbb4960d53fac34615118790dfe3828f6e839b5ea3e. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:59:08Z), 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/DELJ81506640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8973c8100eb52af0cd88f40ef0fdfe648df56d8e30753f2abc20f4d79a623e1. 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/DELJ81506642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e1c2f6cd5aa847ebf484fba8f3ee420c850cf28f2cf0f46e21114577f3de29b. 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/DELJ81506643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13db4da761248a069a44eae19fd36ff7630cdc3ed7639f5f028021ae26fc9444. 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/DELJ81506645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6d0b44e2e8169eee359fc45686c4e340ff3dd0b538ff41c4e5c9e5698ad7d97. 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/DELJ81506648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95b4e3f774188afd907ddbf79910f517841830ebad65ea03bd559b7850d296dd. 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/DELJ81506649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae9ff3d870568b06e9e4110a26da270d80916d7cc8b0d446fdf263e77b6cc366. 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/DEQZ31900593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x926f0a250c5f7a9ae6e9823b61954ae6d045b6435a46c8a683e0abe3ccac0aef. 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/DEQZ31900598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54ee4d7b19866433f58772c5d7c88955603d3695638fc8a4ea8c8a0b9800b0c5. 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/DEQZ31700418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68a2a5e6ec11fe7de026f8c8d4b37092fa0f73a7e511fdf12eb6904467ad45bd. 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/DEQZ31700426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6648e52286f9a86294b2a8c21a5632310da8bf0556547fd7c94a19163ec292ca. 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/DEQZ31500201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6648e52286f9a86294b2a8c21a5632310da8bf0556547fd7c94a19163ec292ca. 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/DEQZ31500201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8db28e650dc6d073d18f029d0bffff799f9efb2e37c03fa1a5d46cc240b33a41. 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/DEMN91500204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee9a072445c10f71b90701963335a8925bc864f3ff8c4b5059c1601cf5f1bbaf. 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/DEMN91500209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x792091b432ddd58d278efc97883510f0640e2aca05a4b4b686fe212e2312467b. 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/DEMN91500213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59703f9b566169990979acfe6a95347ad22513e8d6717be10acfcb3d331c8035. 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/DEMN91400198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeff04fc4bc388e9c0032a8c84130e5eda2a8004557b0088fa54ba4142a25ed25. 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/DEMN91400202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf87f0f4b3368c63abf24cee08f1b1d95dd9e3b4043ab6d9c1de531511e427b49. 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/DEMN91400204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae9ff3d870568b06e9e4110a26da270d80916d7cc8b0d446fdf263e77b6cc366. 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/DEQZ31900593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x926f0a250c5f7a9ae6e9823b61954ae6d045b6435a46c8a683e0abe3ccac0aef. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DEQZ31900598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54ee4d7b19866433f58772c5d7c88955603d3695638fc8a4ea8c8a0b9800b0c5. 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/DEQZ31700418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68a2a5e6ec11fe7de026f8c8d4b37092fa0f73a7e511fdf12eb6904467ad45bd. 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/DEQZ31700426.