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 0x4c6163bdefd4d8aebc3fe6d3cbf4b5b748ebdefb9f0e9c6ce32a005b17e37d46. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b7011ab5-9e37-4b3f-be75-e5c80a6ebe88.json and https://artists.proofprofile.net/proofs/artist/b7011ab5-9e37-4b3f-be75-e5c80a6ebe88.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 0x9ef46b82f5113c73675e38d5b56fb80e500264c6af64e1f3a8bc04d7a339b306. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-22T01:29:28Z), 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/QZPLR2132107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e0f6b256f9b5104da9d7242a73b0bdc20598b5444ed3d32487f149ef750c7bb. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZPLR2132108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b4ac47838881c9638c6137ea00cfd0ee47366aaf614d13f9e9e6fcdb4df38a3. 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/QZK6N2255949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8b9ba3f5fcdf7b24353637dfcf68c1f589d661724cad74b70d9e2b877e23d15. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZTB22280471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0af2cc21ffcc3ffe628a6bfb6e5a5744cb0b3e835991ecf1a5531beedb06b87a. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZHN62361090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54df367a357ca9cf336225a82bc5fd8121ea80886bd76333022d43d4c54d8e94. 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/QZTB72385443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76a74784a3ca35e4a7d96b74a1b6221775722e8ae3f1e80a03f7592f04a32ac3. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:16:43Z), 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/QZTB72385446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa06a408020cdbad2ea1703efe51cc3a2edfe26b00c4165276de80a910875723f. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZDA52464436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd879332000de5b588076448d89ea7b520886059b00ec4a6989abead822f436b1. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZDA52464437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x283c365de04f106dcdf96d9f82fb940a6779e71d8ed3684ce09142807b0e3e9d. 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/QZK6L2448949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc2f2a999a9a141d88a80ded6c1aebec31da2b9481eb832be574a7bfdefb09ec. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZTAY2492084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6204a7c8a7b34d274bf16db61418e7f61f89ba99559955b63454488b37aa9ac. 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/QZTAZ2487029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73240f388bb75480f9fbbe38803ce2a02f9b6ef5858686ee2e89e906b9f1b131. 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/QZWFG2406811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02b00217c86b3203dc6ed25b3c71c3bb5d6f6302a333c5e1fe84172ad7cca514. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T03:55:47Z), 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/QZWFN2427317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf422f8d17e0b485bcb032823601c29edeefa11b674088707e15ce5bfe3f3cce8. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QT3F22426836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a9852ce03f551199c531318c565eb31e380007425cc357b021778d0bbc4f3dc. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T21:19:15Z), 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/QZHN82503283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfb949bf15e96b8fce2749f20cab69147a9e79453413f3496a2bb9c3e8f7b366. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZK6G2513056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeed0dbb91259ed1b53991ff63d078e27d3ae7c94923670938db4f91babdd9aaf. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:39:03Z), 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/QZWFK2504680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0788fa2e1d7b910e7f47e3e70eab6115f0a8e4e29abfe33595779c58b2e7b197. 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/QZZ7K2590539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26082949ad78be7cc856849835c38890af03dca5f9ba77bef018148cf8835cf1. 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/QZZ7K2590540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x505bad6fd34246b980a1f4d80c9b5bcbde3d57c8a92f0ed509827ef0d7804eed. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZZ7K2590541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ec1bf6f77f4eaf50609c8550b2f4b2d43f044c8b5c42839420c490cdc508efa. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/QZZ7K2590542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64d7aee805b358d4821c2440eefb4d129d4cd40fc6188bdcb3a7aa3c66ce3d0b. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:38:39Z), 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/QZZ7K2590543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc43c30a821ea61045aa7a438daf6ff89e8e2e90868fb0e9ccdfd541d5e2803a2. Chain 2 (Bitcoin): anchored in block 958920 (2026-07-20T18:14:22Z), 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/QZZ7K2590544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36a758c83e9e3beaff849695691da46bdff791bad8242a7b4c7d93c400476761. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZZ7K2590545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8f711a21a3ec47ea66e8b76f2ba964fbb0a2f4dd4e6973afcdd66d25b3df52a. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QT3F42509326.