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 0x7d9c5a30415f251991bc6cd2fcd6ced49fcbc0df470ac45ac17cbfd2fd77fad2. Chain 2 (Bitcoin): anchored in block 953949 (2026-06-16T13:28:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1ccf8d31-6f6b-4678-ac47-64b873e63411.json and https://artists.proofprofile.net/proofs/artist/1ccf8d31-6f6b-4678-ac47-64b873e63411.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Voices Only 2017, Vol. 1 (College & High School a Cappella)
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 0xda995a085cd9c78ca2545bc0409e7128ef51002c11cef7faa3d9734ac76d1d10. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TCADN1821800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6423003d7c8ca6e28bd3c184fa67c532edb43ec45208b4990c467fc6b63ea6be. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZPJ32163779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5faf716c5b6bc3d32b543e0d37dda441f174bace4402ce1e104eaab224d7bd1c. 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/QZPJ32163781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e077ea25145f68810a0a248950b790c9ef3c0caf7c302b775fc7ff411774e35. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZPJ32163783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc27faa26a9c06068a9fccecd039f3cf4fcccf593bfad763e1824c12d8fe7c91. Chain 2 (Bitcoin): anchored in block 957246 (2026-07-09T01:49:50Z), 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/QZPJ32163785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x223e0ffb07a53958b49930c20904a67d07ba3b66d2f18cd2b86f7f91e9dd8de6. 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/QZPJ32163789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38e6e8f96a6aae8a8fadf9d904e37e7880a240d9ab53e094efa0d6c7b3cb843b. 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/QZPJ32163798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a01ee0ab341c9256389b203196197a5d3156317f551dc314b332d94b69e0355. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZES62458536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dc4632dfe9a9f40cc39f0003571cd7defe90683bf6eff50a155ac3e415bb95a. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZES62458539.
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 0xa3e4c0d72344cf8369a9648ede205183f1f4a3936d82855561ca59c7283de236. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZES62458540.
Better (The Gate / 1,000,000 X Better / Bad / Better Now / University)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cc0e0a435af6cbba72160f347eb9a28b6b4f175fc573fe50b9fbad070a754c1. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZGWW1992265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x389c068655d1abab6ca34ed649ea76001e0fface4f1be0aa1660f9a4bef3d95f. 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/USE831508027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2b15be7f04d023e9bbd4afed6dc26f1f1f8aee7220a9f41fc70a7e11868dafd. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/TCAIX2431221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96e899ea5153b6dd82672e3da5482b8ba65a0b936259fa9eae11a735390013f6. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TCAIX2431269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef686a5c0bbbad95d571b6459b3a7ccbc236de0b0232e8727f58db7b9823eddc. 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/TCAIX2431409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08d4d6654e44541ca0ca4da3b8fa06ba64b40fb7095ac95627fd2a3bb0539731. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TCAIX2431426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x232a5318011794ee2ab2f906ee086b77d47eb0c9a6360b52226ff56d20714feb. 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/TCAIX2431580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2226a65f22796864d56f145c5c154c8b11556275dade35cea42e41d093432de. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/GBMJG2118040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0900c56c1e4cafa7c48f749dc1e2e3f5b8d11953528e60004bc2e0de51a21b20. 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/TCAHJ2372037.