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 0xdb5c91899d1db4bbc80e8ebe18ca2d1afea30a5ce19145f843bb32fcd2440703. 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/b1d23e85-7281-4582-8d8d-b94184bbe1e4.json and https://artists.proofprofile.net/proofs/artist/b1d23e85-7281-4582-8d8d-b94184bbe1e4.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 0x4f2e67f96b7e18cd63d3ec840a9a11d992fed140450fb1e17f5125edd79a6d21. 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/QZTB82295715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3110e672d62b313f77e581dea096e8f061b86a8192d147cc198a4d1cd5625a5f. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/QZTB92263524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b5d5747125d1712418c1492b212eb76d277335c243edb27682fea15c8e99d79. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:22:55Z), 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/QZTB92218659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb09801aa7f06e26d436606232cd5c738a6f2f64e90a3b9c98c439942f87271cf. 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/CA5KR1964225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5542ed64309149d973afea452b13748e9a021777fd57e236ce727718487ee7ed. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/CA5KR1964224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c475d2eac8639514d3aa9e071c11666c6deef17e2039375d80dca836adfccfa. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:05:53Z), 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/GBLV62212704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12ef850b0c237d7f9b5d0acd7677bef91cd18b9be42e4034a090cd1b592d8307. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/GBLV62212707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58e39125ac9d450286c9650756f0c00b5848dd04522e6b15dc347db0a0416073. 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/QT3EY2477713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ada705f071f8309c23d41e107592c2ecdf9bad615771558f09f186d442fc1a1. 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/QZZ7U2533666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa912d1cdd4137f74658556f3463bc619285ece82ea0b1580a220c4e6be8dacea. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/QZZ7U2533667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbae2f56ed79c445fad7f8b42ffcbda3c9b54b0e4284dca1b5299fde4e7c1161f. 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/QZZ7U2533668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17d28710fd8f7cc93903873c1f49244bcd127beec4f5a619af39b53e6683233c. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZZ7U2533669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5336ab3f162e87a59f577057c52c6dae56b7c85bcd56bc2e3f3f65969146ade9. 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/GBKQU2019377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8ded52a24fb717aaf0979dcb293506111507627b3474449b22a09cd4a82e45a. 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/QZS632510193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae015a4374aaad5c5ed2024d18c280c5fb57a992ca8da04fe28f295f8934a2ea. 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/GBLV62009310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde0ac08667b91d02cde21498747ab0357dfb09c879bb775ad4525eadb5255a2b. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/GBKQU1925582.
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 0x9dc1826009601b4fc4eaca24dc6038834e6ed72c4ff127ba997b009e8b75b030. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/GBKQU1963840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ceb282e7ffd66a5d274820a2a17a321a184aeeb8fb1f734582aaba29dbe2a8a. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/USA2P2353277.