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 0x816bcb617746fa2eee01cb51d6779cf69931c0b88af15930662dacf9a6a63e3b. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a5e8edc1-5951-4921-89ac-b85c8069fa76.json and https://artists.proofprofile.net/proofs/artist/a5e8edc1-5951-4921-89ac-b85c8069fa76.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 0xcfefe4660a866d659644374eb110a59db85d299c55c8474b76389b130a67bf16. 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/QZZ7R2401194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf870ad8f0fc52810a306e8109b0d531b0a475fffff2dbccc39782aaa2e0f5c75. 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/QZZ7R2490538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ee7ae4d410f6dfb604f1ddbca12a2e0121ba89c05d9ce01d1a27d5d33a0a751. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/QZZ7S2419677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd67dd0eb4e8525d80b699394e4869d64be484457b4fec34a865459a1d2ca1120. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T08:08:09Z), 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/QZZ7S2464804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3f25e6bbd214e1ea25001bea43118fa288d8c29d963ef7c784e01590a5b7b6b. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZZ7S2464880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cb1107b0b78ce7957c920cc201445ac183e9c5a57fc08cb31d875cb9bd10732. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZZ7S2461172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5f67fcf28b115b20feb734ee69bd88532b06b276bab9e43150bfa1b257d249d. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZZ7S2464934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e955f67fa0c0f96ec8414deb32596b35d0a2b9aba6cfc63063cf26dfb6100fc. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/QZHN62532777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5c95a1f71bce7e75511ae1398406f0c7357a5ce5691c2f8598c4bdbafb59c03. 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/QZMEN2556523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18e747b555b83b37911250078ea5a746bec1729a29773ebf00dfe813a5e9970c. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZNWQ2506537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9810ec39c09e4a6755c825ea9f5390f4652457197887a4351ab3acfcc0cfd330. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:42:01Z), 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/QZTB72515805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a47065d827605c91b7ef9ab65dfe292ac1fddf3bfe1932c0d557aea9fcc18e2. 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/QZWFE2570062.