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 0xaee1787bd8650e1f373cfa5ab51058cccb845a54892933f55fe5f0b4e3de1a89. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0e491222-62d6-4450-81d0-58190b778bb2.json and https://artists.proofprofile.net/proofs/artist/0e491222-62d6-4450-81d0-58190b778bb2.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 0x93af0e2c7c90eb23c6961cb4dfb2226d91cad9d15f8639423a87e8a56003653a. 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/QZFZ42359930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ede23c4617028be05a807cdb87303c1298c86648682146455228a907c355f71. 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/QZHNB2366716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98a162385535249453363e6e4afb49e7415bb665dec4cbf7f7f4379cf06fb502. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/CA5KR2371904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e250223dbbadbac4b67de0a54123467e4d6aaf63263d687af2d6d4f5370c51d. 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/QZTAX2322181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cddaeac4cb884e618c674f86059973f9cd78f9d262d26aeb36c479c185a4fe2. 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/QZTAX2322184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x621ad3de2535831a6a1c0da69c7004b01fddcd5c24feb21d089db773687514b3. 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/QZTAX2322185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x504ba27271e19fa6849050c59d2cb803bc4667c338c5c0b452734f1529cd2ceb. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T15:05:17Z), 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/QZTAX2322182.
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 0xd9a36df4c8413be40ebf4a3b44f36dbcbc9bbaef6a841ebe16c4d69ddbdafd30. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QZTAX2322183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8d7027923e3888c2d65286871187f87e271609a7e01102f72e6040ad26f1dd9. 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/QZTBF2392913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a3bc4cf18671f34225ae8ecc216adc4bd54426455ed80eaefe3cb76a4a625cf. 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/CA5KR2414507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8869d79b86136f6eed18cbe265d099e751cd6886f2953e49dd6573e647449279. 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/CA5KR2418895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc34432144529efc205c3f63492704636abffebf7a2762bfa7b23b806fb1202c. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/CA5KR2428695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8da369fc7599442f76d9ff2e994805b5652717f8bed46dc1d1d808d3679cdb64. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/CA5KR2433566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7705f7a5208160c93852141e3f608f17d51b4c86b7cf06895abbbfd879d45b6c. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/CA5KR2453398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x854da1dd3a07ce37e02a6a35b7bac8a6266a9cca485c6a4e599681054a01d332. 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/CA5KR2451559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0840bd1eaabdbcdc1278f2d275627f2473ec946babf919f4acd73221b5054b0a. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZTB92486130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5e860df4a6ae6fd611618f0c703c94df70c43eb729b7f17e5072f676eb44200. 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/QZWFH2445851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2725d8ce04866b8382a60c6e633d4d9df34570a24fe9ca099084e69283ffe689. 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/QZWFH2445852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19ef3e9b979b8f15bd7c7101d9551096466dbd5aabcb511282330bfef2aa4d8b. 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/QZWFH2445853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89cb5c7679f7c2b57dd646e9a90d88b725343b7a1dfa889d8336dad396577c8a. 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/QZWFH2445854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x270552fb373d2812df2d920a58bbf1d177b9958bcabc4c9ce60282a378c7dd37. 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/QZWFH2445855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9482e85c7b351bbcc839a99b9db44700332dfd9bd983fc8cbe9e874f5eae78d2. 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/QZWFH2445856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1a48c0e85fd34393ec5634c9a33e879eaeb1f94d732d294071dfe502aed103d. 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/QZWFH2445857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ddbf697856196816a2c0df37558ad989690af4c6ee7c1ba943ed96a07e3dd78. 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/QZWFH2445858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25f1a7bfb2c4bcba3128634589aef7a8acc008bb730b871ee22d8001adf3146b. 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/QZWFH2445859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a168bc4116c9f4c79a2c13ed92256c1a6afbfe4f51987959a4c48683767a28b. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/QZWFH2445860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f9215b71b440dcc135d8e1918efd1daea01d05840b486a5000142dc3390c804. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZG2X2406599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e93935c3a54c096cfd8050918ec85ffc24f0dc215e0d94c2d85eef804b5585d. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QT3EX2451559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5797e7446b530c936e5132696a17a836b5915818b755075b98c9cb498b0d6d20. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/QZG2X2416251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99848887800b5aa078e3fdef6d3c4a06423ebdc591178406a917cc299e004958. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZTAY2503085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x259b62fea291c1c9e4f03c15dc6628c27ff1c2f5ffbdfe720cc7c2cfe00e934c. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QZZ7K2586854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c38ed91773cae6f979a360fd6ecacb2e767d2cdafa63f7147c06af64b3e7749. 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/QZNJV2375285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5cdca83d20c89428c9a62ca391f575474ae243aabdf10539243d11deb3686bb. 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/BK4DA2413577.