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 0x39c5eed76d1c5ff70a4b8b2fe660410deb49cda871a431035d7a479c81c4c389. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/44833635-ab12-436b-a650-f87a6ade3cac.json and https://artists.proofprofile.net/proofs/artist/44833635-ab12-436b-a650-f87a6ade3cac.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 0x07b2bdcaef1f5e03d9793303113c87494e98797956954fc2137bcf451548361e. Chain 2 (Bitcoin): anchored in block 957644 (2026-07-12T03:18:52Z), 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/US56V0502301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47a114effa011d78e5d7b59a4e893acccef07280cde72da0b08103f784d598e1. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T01:08:10Z), 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/US56V0502302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d2fc0a0a031c984999c20f24addd939a595aabf931bb862abbd119598245c60. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/US56V0502304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x008fac3b56524af2e71a5e9bd580f5b9753ca0e02be1f2088f4af9df6d5ab60f. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/US56V0502306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5f139ffd4ecc3e462c59574404f5e8b87e12c9791dcb02357990185c6d5599e. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/US56V0502307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x147d5478959adcbb15ed4faae3319a2bf7f3af4751d6e9d57aa052bb2d7c37ab. Chain 2 (Bitcoin): anchored in block 957644 (2026-07-12T03:18:52Z), 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/US56V0502313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x279c1267141cdc3b2f8fe8517aeec3ab9594af96f23600e732426b99ff5a79d3. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/US56V0503301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9621c6333f46c477b589e5ccf1630f42cf7bc952304d715547e6c990688749da. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/US56V0503302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0030e386aa67eb831396b5e80f22e8e1622061711ae9f52fe74e094ed4d11e34. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/US56V0503303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10c204ca15bfccc7c245de88203c989b031365c2d1b5db173a88189ce98fece7. 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/US25T0410005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33c0ec4e7e996e11a8702703ea9ed3013b185a654a630fc1e5e30a47a52f17da. 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/US4ZV1010415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe542a4f480fafff098e866b287ed81a4963fa9f882e3cb79b5b4e36fe9ced77c. Chain 2 (Bitcoin): anchored in block 960419 (2026-07-31T15:20:33Z), 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/US56V0502315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56a9fa0e5a6112f37c19844c67d2130e2ee550d02577b29d80644ad01c713bf3. 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/US56V0503305.
Hey Brother... Can You Spare Some Ska? Vol. 3
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53c967ecc8ea421a4ad826c540c224b9b4b875ff5a2fdf35a9986f8fb172b8c6. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/USA560525876.