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 0x197894d114cc50a395051d7ac50d997bfdd76cc56d70c777350516bcd3030aae. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2b6e0c5b-e98b-4e34-b64e-9838bcd93d22.json and https://artists.proofprofile.net/proofs/artist/2b6e0c5b-e98b-4e34-b64e-9838bcd93d22.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 0x6a5cdb5005ccc2fefac62e36419330a70052421ed25e9c5be81f3dcaa8d58bd3. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:08:09Z), 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/AEA3A2147436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3543f9044064ee5e6381a1848698123d9cf53bd9363e3f863e2639539a409047. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/AEA3A2117464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11a535c4acef1652e25c5ec749c4a15d47f8cc1c9a31b89f3c79b6c9ca55bf97. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:02:03Z), 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/AEA3A2100225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc45cb48f25138d68147fab9fb0b89f290770cdf6b379c3373a0a2251ae3818da. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/AEA3A2154496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8b01bbe82bef02224359309baf37c32f5667b30c2b07e0bfcd248d9bcea54b4. 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/AEA3A2122732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba8406d20d0405e75cf068de427cb21393336b6860c7c5729e16b6349699fafe. Chain 2 (Bitcoin): anchored in block 958860 (2026-07-20T09:58:28Z), 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/AEA3A2114080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbbbb06cc99703cea9564c647b17ec40bd9d4897a497bb00c4f692d945a963c4. 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/AEA3A2133826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77636cae8901ded87b231f49c7aa5265468ea1cb1384a30b71d9efcbcd27f405. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/AEA3A2132102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc92b9415dbdfcd8fc5a28f9df58cc40a562c93e1be6d0af41a3427a9e9fe83e9. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:09:59Z), 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/AEA3A2183256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b12e8c6f1e81f1dc3c2ec3aaa17d24e30e1e249b6105e696c64bc5c237c54c9. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T03:04:53Z), 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/AEA3A2149726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09894e400cd6829541aadb8ceb3cdac07cf44239365c63dcdfcc3ca1c3f8bbff. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/GXBAV2006830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdb8ab253231e24aaccb7522ffa91839a2e50011bbca02d77a909cd54795a77d. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/GXBAV2089352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec3193f8b7dc141369db6f67cec6f80f877b13618479fda20e715caa70bd69e4. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/GXBAV2030919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21b4d10abe861f1d84a8abde73342b4bbd295eacb5d7c0b91d7337568411b2f5. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/GXBAV2055854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82ef170756838e8199463f679c018ba4e713fe6b93534c2851332631fe187646. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:44:53Z), 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/GXBAV2035286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaa56b1b7957604413466573542293ec5fce2a4aba8fb9b623871e29ff8068b2. 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/GXBAV2043265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe37ef86dbce0d1f850942b93ed41817c34ac0359b653529f54370e1dc749e6fd. 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/GXBAV2037640.