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 0x15c5cb0c1cf2b70872a45fac6711c3013bbd5b65794b4328ff9b1eb9c529859a. 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/1342d472-7173-4d2f-828f-3a58c6df9979.json and https://artists.proofprofile.net/proofs/artist/1342d472-7173-4d2f-828f-3a58c6df9979.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 0x0fcd6ee2dec486cbc428dbda024f21ed1ef2d5d29afd0bf4f4967e24545843aa. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZRP52382471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffd615e6e4b6f77b5e2dfc7a65af555237b7a107ff9e62b2820bc51ac6f625dc. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZTAZ2312456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae8ce0789d344c01ea9a46c0dae6331f99a9e5f3e3d1e97e46578c5c2326e32d. 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/QZTAZ2312457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fc3edd3457b5b8308c33134c4680ac64cffd5a67bef4a706ad167b3762502a1. 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/QZTAZ2312458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76d50075fb9c0ba203c7a429e85adf8c936bde4d192ed4294dc6fa50fc1201b1. 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/QZTAZ2312459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4ff06ba9a2f07abec9e0f8be21f2a9b2d9a586795000d2ed53b89e691cec810. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZTAZ2312460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x093e54f82a55ed444926791a60760e1ecc10542a0c2aae6abc4d500db3bd7d99. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZTAZ2312461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9213525c3488703cf0081eaf55a49af7e3dc2da0ecfb1f539ffde1ef154a28b9. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZTAZ2312462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x323caa9208ab0eaa5c27d8e8cab8103cd54be617bb5dd77a9bbd9488911307ce. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/SE6A92175390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x401336653425d121e3a90e6430a9b7847f5f78ea884aa988016f845eff9d29b9. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CAK472300104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98698ef6c4634a4af7305a976a7735ea29fa615df67afc976286fe86b1603706. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/CBBXY2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1ffb173db19079a9aff24692c3785f65a14a96ccfff3e4c4763c61cfeb6ca4b. 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/QM24S2202983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26dafeb39d0ae2cee99fcbe8d0f7fc0402c9fdc9f9c25bc55a03dec38fc8d5d6. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/SE6QE2128651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf08914ab7cb741f74cfb8936ac4665fadcc7ffeef8495be8ffa7ad8c8537dcd2. 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/QZJ842400308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45c36c277df521d7a21c8f4d38627fdbde348e101088bb0568b0bd0502652069. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZJ842400309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0c06725a6af14ffcdc339fe299abcb615b971f1cd3bdb2c42161421bd520a15. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZJ842400310.