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 0xbfbd713052b677362c3c484164e9b6c535c4e2da69ecf99349602289c94a0d12. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/53d642e5-f039-433d-b909-e935b8ee9613.json and https://artists.proofprofile.net/proofs/artist/53d642e5-f039-433d-b909-e935b8ee9613.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 0xa716f9ae61ee4dbdc2294e52848ef7d00884e0be261781afbdb2c27d7f2672a5. 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/US83Z1775480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe794de63bf5771aa0ab3b857bf46fced70b3e82a9075945388a7ce513ab47580. 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/US83Z1775478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7eb440aa4b9a86571fdc5a4212c723a8ad4bc6cd1bccc7409185aef3e686cc9. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/US83Z1775470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x675aec88fc17d2e3a4044ad22b163cd2e38c74dd7912cabc041dd1df1065ba72. 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/US83Z1775473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2b1f3c6d3f062a97ff390fd5508a204078494299b9b0bdcc7fa7b35bb250781. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/US83Z1775469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f68a2d79559f5ea3716ed419cfc7c2c8a001c98d51c6a3ead600dd3d82e02c7. 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/US83Z1775471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80eff8187c44f31d78209f7998536bdd6341c9a8dd9ee612ce68acc0e7292993. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/US83Z1775474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6be95ac6101554ecd471ad141e1a93f6bdd934b2bd31a233418618c8019b2b8. 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/US83Z1904513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8583373a28c6d8870e1c96a3622da9b563beb5b028fe91e7c0d50c80ad211ea. 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/US83Z1904518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb679a35db857f74a2c46bf0987e57bf9b8fe2c79fada1a254a45a9d5ac39b08d. 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/US83Z1904523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18d42cf8bd2d36d2ed0be8a5a44537f5e45294ee838455acb1ad007323eaca99. 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/US83Z1904519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77cccb839e862709deb985020e7385ae0279caabb223751107f19ee4c2a511d4. 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/US83Z1904520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe514be798d8fe89f2989256d5772764a6fc5fb3fb005b7a48f047a430ee9f80c. 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/US83Z1767783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9177502af8b9f3b3ac779d5eb9973908d35957945ca99bd4987bd12f6c7b2736. 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/US83Z1767787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b660b723d923081fc46eab5361f8fae871c5846d6b6af45d87e2a4ec8c17cae. 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/US83Z1767796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f3ad00b3c4df6aabc0ac248ca84a0aa76508f9ed8d843d9391ad89f2d0de330. 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/US83Z1767788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b93c68b798de06df312690c615281f29dfe3249136140e92265bb35f62b7bb1. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/US83Z1767784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x593965f1cbd046fcd83e73c1e05b9cb97265f08142ac32bb4194160759e364a1. 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/US83Z1767798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2dc5ce729d09e87de3aa8d0d0bcd23765d1c4f9a572d17ef299b3f76a25c3c6. 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/US83Z1767795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11fdff5514535c00cee7022962535483b94d5cf73575267e273b66a9c4e3460f. 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/US83Z1767790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x951f4bbe9ab1d39f428bbe961c0a6630e78939f6ac2a287fefb5d1d924b95047. 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/US83Z1767791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ef5a2036b3d5d77b24c869a4c339074069fd5c11b66fe838263785debf53a67. 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/US83Z1767789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0768d9128455d6e0382a9955de834229d380f31dc513ceceb205b86911f4506. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/US83Z1767785.
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 0xac805c764185d6e47426c1cd4f16e779cbf8b0b5533467f087d5983ee661eaf9. 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/US83Z1776991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08c4fb3d2762014d705c1d9080d08a2d8b6b87221a5f94d91eec3953154a4f2b. 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/US83Z1785871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x335cb89e018da50973503fb60999799e961c7e6785dd183b6ecffc1f5f7695dd. 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/US83Z1785869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba0086ed32909aac05cff67c74d7fd367c603f9860e20a353f68d1be85fa9afa. 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/US83Z1786400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28d7312bdd9f238768a75e139129dbf673aef11dbbf2f15fbcc8b6346cd69434. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/US83Z1786398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c56d83f3a316b8029c0a1d8f0a45d890f45cedcd8c2fac595323f35e09e7d5e. 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/US83Z1786402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec4f241c9b0a9e4c91bfd7f1217727a2a68cbf41ebe852a09676dcbb37da6f41. 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/US83Z1786399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9751b69c9d258b07992a9c8f112e9482bda7b0de0df57ffaff1d2e44e807e63. 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/US83Z1785874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04c733452d7494cdb1ab609ec82aaa5e783ad41209ff060a3dfab000895c5f54. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/US83Z1785865.