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 0xdea16899d7d8844dafdf8a6b5b7fbff0cbb44670d6b228f8544e95f6fbc657bc. Chain 2 (Bitcoin): anchored in block 953694 (2026-06-14T21:38:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6cc7477f-dd63-407f-81a3-30197233f070.json and https://artists.proofprofile.net/proofs/artist/6cc7477f-dd63-407f-81a3-30197233f070.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 0xd62a67568a32c85f9e1c03ad68c443cdd069688840c7adf0289a06d43889c94e. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/TCAGQ2293947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1256c7ae8e3ba78b5de43f94bab31b37a82e24eda4f258d18b44e96551ada47. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QZTBC2390306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96e8037b43b8a2d73c0c22edd5f81e261857c5920d8b76c7bcf25d225867998b. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZTBB2343792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x137301913e1bb9c9c3dc9011c7d7aa5b9ea2a33de8884f694a86b0c37258965c. 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/QZTBC2390307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc99592be364b934ea72ade80c35c650bc8955fbbffae3011cafbe70c4d75cea4. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QZTBC2390308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b49d5e173e773d95c47641e07afd7bb589948b115d9569d5fa23be45661d00b. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZTBC2390309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98d2a2b8af966b775f9b7c7c1c155520b8e71883b080db24ac1baa8d345b9df1. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZFZ72463842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x758552da1b8a0368d1f8387e9e5d2085e1d19c0702f9d135291833ce570d4bf5. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/QZES72485572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70a76585b64273c665b3a35ac0505b39a21d457e1c7d0841e7cebe616a4cc546. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZHNC2462754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52442488a0880b2ce7703ed6bbb553354457e5e7c3c4c7b73d70d5ccebc8cd73. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/QZHNC2494374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d5498798186783a7cbce127dd319e5f3badddc2592041ab11dd519e4eb09a48. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/QZTBF2461786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb52b318c31eedad2fffad8ba6d62f114cdc85cb979da7ebdbd81e233b25b0ad3. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:06:44Z), 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/QZTBF2461787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6c1ff5b23f2979faf24642727afdf538ac62b4e978f2b101f964066cdad2961. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T06:53:30Z), 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/QZTBF2461788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72dcce34e569d7dd312194a91ab706ea1fd7276fef5e0fca1bbe0409370e5798. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZTBF2461789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b0926ffbb7cddaded80cd9c8681b352d82ef18e086b0d9d28a0fbd479971bd1. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZZ7T2450011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3b715c7dda0a356b9d2a3107173836fcb7ceb7eb314e7ddad3c2d935b1ccf74. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QZZ7V2408651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cd81cce45e9787a1a2fdf20d86df271fa81119cf9e992780f03cad4a8cb6b9e. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/QZZ7V2408652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca9d65da2090838d6c37af7c9e252a1c6fbd8a56edde1b0ce510d213f85f08d1. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZZ7V2408653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29e076e5e82f315411f03607bd63ec7423829c476a4dfaaa5382fdedb459e91b. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZZ7V2408654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d4afae1e1cc8ea9f70aff3e850720813515d23dbb05426e9dbcee63cb1c3b31. 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/QZK6F2531944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc12e846487ff2ad9e2df4c5bc1895cfa9e1f31abf0f8edfc962333f6bae3bd3f. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/QZTAU2570233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d4afae1e1cc8ea9f70aff3e850720813515d23dbb05426e9dbcee63cb1c3b31. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZK6F2531944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfee3e4d40c0d43f3c8db2c6ae192b10f40cd8f049b82a4ab1a408cbf1ee0f696. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T11:10:53Z), 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/QZTAU2570234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd41f72b19d5d946ef4068ac073a809f439d0138b76dc32ea6dc5bfa02a9b3eac. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QZTAU2570236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c2bd14c3c351be6a02abb723abd966c7279b93e94744b5761a40c3c289f863a. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZTAU2570238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45780e5b678243bc92aa0b1f2774485c3e6522edd34715a660c80a600245c90e. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/QZWFQ2503989.