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 0x413a9d0048de36be1aa9d4d856f8d2442b6dbf6067eaaa45a3ca7d3211920d47. 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/0fe15c9d-aad5-4d5e-b0a9-9e60d6f6f950.json and https://artists.proofprofile.net/proofs/artist/0fe15c9d-aad5-4d5e-b0a9-9e60d6f6f950.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 0x2cba5a2d8525eb4243c8509ae78fc8df785ca78c6dc24f6c4dbaf464498e2551. 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/BKNIU2500061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81f0a132f73f46b55421c5acf1ee37572427ac5d865db892fcbedd0b39ee8eba. 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/BXGPM2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ad376ad2d4a7bfd779b5db6279cdb9e281f7463c7b7697c27d2a9c278419ece. 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/BX6Y62200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe26764fe51092ab3817eb828a7a395d7c5a500decf781fe0b4e28b3dfecb61bb. 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/QZW9K2419929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x418fcdf37d25fd39fea445b3d42cf43868a3822210ee902214c45b57e3e4e3fd. 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/BX85Z2200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8255294bc96a612463e0ebf892000e3048edb2e6f91ff676f9ffb6a106f712e2. 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/BCBA42100025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c32ab003f9bb64646b399b33ede01b4e5c98c4aa9f77327f726317cb74d9a83. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/BXYVJ2100039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd795047d5c6740d9234c7553b354d7952d004cf5e2b8198d81ff4780627c0b5. 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/BXFGZ2000042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9713e694f66db471e370226fdbc3cfaae47285818e41199c9ecf3eb355e66072. 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/BRKO12300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e7ab81863d71e5475abffb63b10802abf4b0894f25215d653419b1ae9bdd7f9. 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/BXQZW2200018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7d8531cb43eb19f96983a2f82beee0d713299a1523fbfe935b2947d426bde9a. 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/BCIOS2200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x562771efdfe966785c90e6928491648e7f62d368402da14ed1b12116b9d99a73. 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/BRRGE2400523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f8793f974442207c2a88e6489e5d701bc605fc061c44c2bbb903e55da7f6dee. 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/BX2BT2100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3cd1e66649fb0b8bff8c76c7d75045890e4ec698e7597c06569ef5ac545cc77. 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/QZHZ62018951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ff6860ca140d5e45c98ce2c3cca74bc111dc3b684e4c0e1310aa54590b65ec6. 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/BXQZW2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceca68e2f768e47c295e649c4287fff64978fdcdf0b3a1b9163367c4d7512998. 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/BXQZW2300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a16953eabca23ed22d3d567c28b0c2ddd52e2f8cbd4cec1ca2a5238d3ebf649. 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/QZHZ62065727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a5c08117d6ced0ce8b53230f6fcf4749cac52347427002a2034c3408649d866. 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/QZHZ62065728.