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 0x711d6497f0f1e1ec38cf975763d678cdb63d4e64aa7f4ab8e327580d49e4edeb. 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/d5bfa394-0a7e-4dd5-81a3-d25e3ced4ce7.json and https://artists.proofprofile.net/proofs/artist/d5bfa394-0a7e-4dd5-81a3-d25e3ced4ce7.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 0x9956c44d8302caac85ddfd98021e694913c977b22e5b470855ccae5d8edf7ac0. 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/GB8KE1653254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80bd5bd7c8265f15ecdfbc15bd13550041ba710e5e6671e41b7915b660efd6f1. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:25:55Z), 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/GBKQU1750082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cc912672d0082e265c936b6501baede145e4d6ec39f4eddc28f426cbe8e0989. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:52:47Z), 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/GBKQU1748721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbf58eaeae15d5a18112e6055dd4efd379f527e2526c109fcf6807176fdf3849. 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/QZ8LD1765484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd77f31496946e86c1cd607eb1af4e44ae464b90b512d608a0ce313856f65bf7. 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/SE6A91816495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76448f7431ac79c4eb68cbc9dd411d2fef186ceebacb652c53e7aed1bb910778. 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/NLE711900081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7b523332f7b07733e79ca2d5e90044edf2b7871054836b9b7aff8bb7689d094. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/UKDNY1900700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7b523332f7b07733e79ca2d5e90044edf2b7871054836b9b7aff8bb7689d094. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/UKDNY1900700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedb9b39730e4afec722ea7820ce47036a87eeaaafda9ccee356e7f4043de5f87. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T13:49:43Z), 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/NLE711900194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf75a9f784ba05973174c3f3da4301c1d981be908b86baeedcdb4cf81427e932. 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/SE6HN1922709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae8b2fb7c39d389ab60cfe0fc424009ec3a8eb18721f628d5e189b2f3f07b9cd. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/NLE712000160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65050297660fdd8ca4df4079a3fc6286741e75b01b9efaf8602dbb626ac49394. 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/NLE712000735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f108566c0b92f74894bf12473b094d1e71dd02632ee6d377f60d519a7b43242. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:49:05Z), 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/NLE712100120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b4d2b97040fe4f5ba7864d0bc5addc7e9a01428a3448f6527a9149646167036. 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/NL2QC2100236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x110d65c6288359ed3ab68e28ccf62f51d2359a4561a67844e14e014377fe711a. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T21:25:30Z), 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/UK4ZF2200035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a97e061ac5b6b41d4990367df8cdb0312d9181ab184d5f1e8eea60db1d48c60. 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/GB2LD2110401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85c648c85652f62ad1d1fad2f18aa1bc2b69a8161351bdab1956bcc72d3d55a6. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/QZK6L2245018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16bb0a4ac9898ac1888569928198e15250e4ec0140af382214ea48fc9b96d8b5. 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/GBDLM2200299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x924ce30bab3fe54a56e64301012bb272a6cd99f7f2cf538000052c4bc5820742. 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/NLT2H2201050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9816b39046b35658c1eda2f5c9a05020e0ec6be4b1e6160b6875803ed05f3918. 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/DGA0R2402567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6e9a1f33027ca6c2307089a4a96a2abfc31896d359dda9d0136c9628cc91643. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/UKW3Z2501984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6861a722bab56d6e14321e11921bb498c5f8b4ea890b9ff0096b026bc9a807b. 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/QZNWY2348815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x190fc28a0a29316be872f267bfe29d2bdb90a397c7d6b07a900acb880ac864aa. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/UKLZ61700002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67e66fc293de2c8e8de004ceec60bd1fa3add0c816c915c4f343aa9afd401aa2. 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/NLE712000159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x557d1f0bd31e27abee91c5453e6e771738775f7d76e3747ee385ab712ded8a54. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T08:57:56Z), 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/QM4TW2371662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a6224fba20614a21fed272e9c93a77cf09d0850f6eee71b7aae526c2eea9207. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/QM4TW2371669.
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