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 0xd0ffa95fbd1a4c40c2c4533bf5c2c60deecc0f8300aff5c24f6baed33f6af547. 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/d18b5af6-e3e7-46c6-a7dc-6b5a77a76232.json and https://artists.proofprofile.net/proofs/artist/d18b5af6-e3e7-46c6-a7dc-6b5a77a76232.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 0x1a3ed1dac06d03e41698267ba91068a7dcc9fa34dde449c5348af50fc0e4bd14. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/DEBY41200203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34cad226458ed9963a40c387b681f3d9e248209e759ff7d1934db43e834b9afa. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/PLE071707901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x673a97f28d1423a2d1f1f9b5f0f06a0329ca509bce70e4551d1a70d60c61ce2d. 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/PLE071707903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fbfba943a33e6da7a9972d6b2ff712a22c5263a300e881457ffdde22052ab2c. 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/DEBY41200270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ae841b9653448f80c2101ac1c2d9efedc153bbba5ed53e60d028e416eba34d5. 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/DEBY41200271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc7e2c1aa772a55864d8ccea4c4c25e502b17cbdee0a811e462b8a4d9932ddb7. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/DEBY41200272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x617522b8ff27c04058db29610e416293ff55fb2a3aa071bf7eb93072d2a7b981. 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/FRX201743931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6422e08f79cbd3eac7f1db487326efb18ffd01f5462922ada2f31ad2b362f0aa. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/GBCPZ1814320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c6707a2b6253a829051a54361e63053f20145539b58c7ee41ff7da20276dc95. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/FR59R1889809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d1e295b6582ead29975c72433bf3682c0e370ffe95ec05d0d414dbe4bc02f70. 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/PLE071910605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5601baf44f0538dfc21550de8e02dd73fde734f2b0f57647042e79a74c62a35. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/GBDLP2001136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x196334b21b935ea03787a7d558d594968b999d62d7f666fda7d973d06120bb6e. 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/GBDLP2001137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cce047c9fe1fe2430f1e47fc7b7cf557516f50a36fb86ab0b32e78a5cad43fc. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/GBDLP2001138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5ce56967b66a6179570ddecaa1e1cfa133fd0a78b77e19f4498ddbea4075d13. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/QZES72060650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf27c51673477c9f0e8e5d14d1f9079f682dbf36536ece8b02d0e48c21f848efd. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/UKN6K2000313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd69b92935b8c5b6cb8b471221f19fc91ea7c9f875f7dfe0e407eaa70fd2bbe9. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T12:50:26Z), 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/UKN6K2001614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb024703a648d8dcb82c75921c4399937118f9fc6044cdbedbc62007c98000927. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T09:53:19Z), 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/DEH742207234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f954ef78ac531b72024ca57697ed9ff0de05b4861fdd6a69fd4999f70528c2a. 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/DEH742207233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27c476f7585189e1a1ddc94f2587af9fa46f4d41f622693806a3174b81ffba42. 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/GBDLP2201245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46854078641345f0c1c8d85afc07f57adadb09232e41d0f9b01f08daa6731282. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/DEH742230483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3f3fdbe480a8bc31330de8c8466accdd0f0d8d60d96322591b747aef5dcbb24. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/DEH742230484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bd99c3b93ff923fcf28c246280edbf85a2d4abe94daa557eb8a08ca76235cef. Chain 2 (Bitcoin): anchored in block 956713 (2026-07-04T23:03:25Z), 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/DEH742332402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4162a7114c54ac0b8bbdca72e829ded560c50446927b4d921694f3187dc1cf36. Chain 2 (Bitcoin): anchored in block 956713 (2026-07-04T23:03:25Z), 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/DEH742411105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee6d5d9c0f30ee11b567a3cede5db52f0ed49c68d16fee7d4e40017d0f25202a. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/ATUM72100214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3feade9934b799e070f1cad4da5023e1d49e96bc05cf3b3ef2f31c98efd5a0a3. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USUYG1468461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9995ad9027164557fd8c95ffeae6b597eac8a90a9d76a146397f93f6cca6f7f8. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEUE21703543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa534f4a314d30986a60f9ca46a8460f44d463907c4df223222d72d8ca443d04. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:29:42Z), 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/DEY471815725.
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