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 0xb2ec76e88c6e877070cd269926acae633e42533b5b9551c233286fd14f2aa3c4. 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/f14a806a-ff3a-4c01-ad8d-44deba1e252f.json and https://artists.proofprofile.net/proofs/artist/f14a806a-ff3a-4c01-ad8d-44deba1e252f.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 0x3ea1bc776f26d81496a2a67a8fb5230859837f4ad2945e708705daee4091ae39. 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/FRX872024557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca6cef44d974901f269afb2e849ea325fa450af953bec7b2b0b3d60c4b2459fa. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/FR26V2015544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbd5d5e3492bbf6e678b7f5991affbc3cf6c5e60e0a39ccad925b53f1b09aa84. 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/FRX201737283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x492afe785afca077e55a64c68d8f01f92cdf9c0a6ae5b7593a7d269beb112b67. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/FR59R1868519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd11659a925f395edb15d16ff2789ddc7d602058544164cf0344569dd8c9d611c. 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/FR26V2034313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x478b28448d170c762c84a1b643bdd42724f64a7e3cec1fac5c7712a54e09358b. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/FR96X1808225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70d87f06acc8bb83734b3833c7b70261249ef118b1d7a0a87842ff498add1bf9. 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/FR96X1808228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaabfc1513fd020207d3d3db14c457ff3d075aac303d45e36988db2b9f355a5e. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/FR2X41818858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2072a1a3e2441619d29e56890e846591abb4d34226c612e33f2fbc698d9eafa. 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/FR96X1808229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ff01beaa9376874842da907e6ad8ddd4fe0901e9bcf22ff48ba9abcae036fc0. 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/FR96X1808230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe03b7120d6bf9c18c29b8bdf8d49a4c128d4a2397efa059963f11f81a4a4bfa8. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:08:19Z), 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/FR96X1808232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x347783acb4ed978c8074261dbd555d90feb5e2f74c3379052b94a5834b710aa2. 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/RUA582104547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87ad801280b4e7b49d7a5b4dbcf8daf390481c1a810edf66affa4db126bbfa11. Chain 2 (Bitcoin): anchored in block 957866 (2026-07-13T14:54:25Z), 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/FR59R2171449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8863d570f5f33fe64209fbb7328cb1767f8a7e433a49e44fb6063b3d18e37551. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/RUA582101182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f219d76551575e9f5033502707633e2fd39c8865510312560db7f9f09ae5785. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/FR2X42169617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f9377db80068015e76231ff64ce67b12c97e4841c55421e17d024f13d42766a. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/FR10S2232246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd6f3e1c3c05d07be3a7e239e581ce8a7e92da2b36d939c8e5b0f5c461b0fc3e. Chain 2 (Bitcoin): anchored in block 958695 (2026-07-19T07:37:00Z), 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/FR10S2232230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aed0d38ed0e021ba3732728bd77cc880e41566dc1ea2a77aaa3922862d2b82d. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/FR10S2232233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72b0c5a3e6882a7896891d121e154d143756d4b623a497f56be1cec96248d684. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T19:19:41Z), 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/FR10S2232234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e2b791d4c86d066036209429c2de155b52248ccae66ff7d0899f15f7052f5bc. 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/FRX872113238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f30615da40e7f15f8e6aee34aa651509cc371fca6ec6c3098951f8662f37aa7. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T20:16:30Z), 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/FR10S2232242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4328ed5a8e3c5f7e44ac4bc5dffd3044b07c4d2e462745dcd53f7ed6cc452e1b. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/FR10S2232244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f219d76551575e9f5033502707633e2fd39c8865510312560db7f9f09ae5785. Chain 2 (Bitcoin): anchored in block 957801 (2026-07-13T04:17:08Z), 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/FR2X42169617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbe2997d4ad381a871dd917bee633cdbed0cb6e3e2d531eb283e6e81c92589a6. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DGA062298445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeba5c3c848692c90c4ac87acdf33c3052acb54079c4119cf83c359a24810d1de. 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/DGA062262330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbc4f97f62c9d53ff552b56d15045116647f7b8c1ba41d5ac0554477d3541e2b. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T10:00:20Z), 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/DGA062298458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5e9d7331fa33a2f38359356879fe75f77be4804331fcee9a54b1b814c05dbee. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T19:28:46Z), 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/FRX452386892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9785bcf258823bea9438e39d9c232fc7da7ab926f11cc4096a93b7656db779e. Chain 2 (Bitcoin): anchored in block 957868 (2026-07-13T14:56:55Z), 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/DGA072382412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bb4b0ec2d32258d03bb7212aec8ed5b243cfdd2161b8d3499134cab8803c064. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/RUA1D2459356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7210076929c41f38fe7f5199e33c80e6d2562125dc780582d1bbdc6403440eb0. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:38:45Z), 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/RUA1D2482341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c52aba51a5188aa8a7544381f681f60aba9a832541010b3e0b03502d526bb11. 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/FRX282320190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2560308d07733fe53f1b0dd06b013eb455ce37e04d2831796e0a9aefd566a30. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/RUA1D2510191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4685c7a1b21cc6c8e3925d2e384e1adc4e9c2bba227556d077d429e0fcb85696. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:50:19Z), 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/RUA1D1714843.
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