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 0x29e678465a87ac7005f18c86a1c5e5fb1883d82a8c274817065a5d0919e85417. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/16e04d80-bd57-4ecc-8d5d-d2c0e07aae3f.json and https://artists.proofprofile.net/proofs/artist/16e04d80-bd57-4ecc-8d5d-d2c0e07aae3f.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 0xc434f8e376d73f260f0b46aa573bab53ca93209df930fb37851186207304b000. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZMEP2292597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c1851658d4bcae7513a138f5576f602394ad5b0a8f5fabd2bc8dd53009fc072. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/QZTAS2267863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x324c814f75e81e841fe418e77e722317d559921b8c68220982e307950a11cfed. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZK6G2362062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6b133facca2dbf1bd3789a1adc9b0165e1ebc9e44188aca84577589aad20246. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T00:11:36Z), 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/QZWFH2380822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x884ce024544a3be2a084ffc4b4d482221e2561c1140c223513157630daa06086. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZK6L2415350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb67f248d8141ce07c7aa7b82645b70cebb2aa6af62091605605d97cfb2f3c6c6. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/QZTAS2456124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x237771e06e7d3de4f61c441dc508a29fa132188611a6a636c7dda0a42b110e90. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZTBD2426688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf16e228dbb30ca41ef75f6597db26a038dc2029639aaae2a51b10d4a6f0fdb0f. 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/QZTBE2471141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb40403e54c78259c23eeefa62d56f3cea57e323395f73c76782d573473639fc. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZTBF2459627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bd0543bb0eb4fbffcdcb829c1a612117145ccdd78a1fd02deb4462fff13a950. Chain 2 (Bitcoin): anchored in block 958722 (2026-07-19T11:03:50Z), 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/QZZ7S2410676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44cb720e07f115aee18f8a02c94ef7bd940de376efc03f7e7de7b5be89bbb386. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-19T21:40:06Z), 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/QZZ7W2456982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ee2ddded1201ed2198a3ca74cf0146859b2e334aa2477f5d64dc1ca796546cf. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:41:09Z), 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/QZHNC2510863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdec4c7f5d45454126d905b2eeee8421014eea5255f754f38734c0e0b9d1a9552. 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/QZK6G2562339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe765f9aed77622a18799b110f66371530ff52f42c26562f0d5b9cfcd7a27bd29. 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/QT3FG2518721.