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 0xb39f2656dd04311f19b4755d59fd5e56011a518257a8be1b5c12b1a0278eb7e9. 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/b2ec755a-f835-49f9-96f8-f5d8b18dd005.json and https://artists.proofprofile.net/proofs/artist/b2ec755a-f835-49f9-96f8-f5d8b18dd005.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 0x7d2d7e0380120ecafd2476dd2f0d2d52e9dc0d8c858e8ee7c2bed47502d3e654. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/ITDF62019362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2facac1a8f1765a5dd8aabd62b05b296225311edd08cd81d854968c3e5823cca. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:24:47Z), 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/QZHNB2202577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe09bdf2e02e591c3c14f386df54dc50c19f097d9916128bec6b54f86757a76e3. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZK6G2286667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6f68261153363258e71a02576333d918f576544f4f9e3a788b8eeda51138b89. 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/QZTAZ2230749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8c2341727f00e15ae34336fe511c592a1818a4b9341ce848972643994f8098b. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZTB42200178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c6097ac2f91bbf16dee465c1d2e1483b24544bdc1e183c29bfdcc24aea065a8. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZTB82242201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bcfb3f76638f41e2536aa3d9e784e15a023f3aaf3a950d74bdc75059c5745b2. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZTB92270966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2338337dbae5bb81e62c4dcfcf433b08ed60aebb3e05de64bad6e6185f92df9a. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZDA42340418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c7f59cd0352d2e1d7eb796f1c3b4928729d2c29b9ff65710d4e8c6b9f41c0d6. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/USA2P2309084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x935839e01696d7a35c38d0811f97a134b9aba6b5467429e48a98558b02a8f4aa. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:46:53Z), 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/QZDA52343745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x533865705596d0fbd493ead679cbbd530cd5f825aa3b81db9e20d3517a982fec. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZDA52343746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37184d32fc617ce81995c18bf3e23e15f6462f00add9a07901be2ad753834563. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T11:03:38Z), 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/QZES82398156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35e7c27be3ec43d4a1369cfd3053722306890c2cc81525b2042491c368070db7. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:23:52Z), 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/US39N2308854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe79eaf5e4d7ba5c32868cbe9a9fe16bda544230c4f4b7312eb00126ce5db92c. 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/US38Y2300391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd562319def6c8b0664758308a1a7d0f0fa29ee6f1851c296cdabed1d82f9ba75. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZFZ62497431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75ae76819c036cd1e94886000c6ed1cc27070566c9d79c616ccee24a8eecf4cc. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZTBC2418475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x116b7ce597627deb7a8d6b8bbe9d4f963cb4dd7a2ef2e59d8757422d8b07f880. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/ITH1C2500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46ad82da76eca484a083a3a54902027711585466fbed8788ae467b948e8dce43. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZMEP2588777.