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 0x6bf2bbacfb5b399927fec579f2ba6dddbad9a5cb297ce1eb1c6de808f7e23ddc. 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/21f72696-f78f-4a0d-8137-3c6373ac341e.json and https://artists.proofprofile.net/proofs/artist/21f72696-f78f-4a0d-8137-3c6373ac341e.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 0x52b4190ff9eab24472f88aaeee5af389fafdbba7529892581a2c9d7b8f8f6376. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZRP52381038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42a228acb7dd4f5d67e541d1bc27eb2e69c7f1c63f6316c1d02e2e143f78c566. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USA2P2248811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19137c9088e241143f61ea847e44134c9a383cb954d40d3132a631f9c1c383c4. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USA2P2107916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42a228acb7dd4f5d67e541d1bc27eb2e69c7f1c63f6316c1d02e2e143f78c566. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USA2P2248811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfa1752a9c771fd4a6b8a4dea132a51b4f95833b434eb62e9beb2d166fb8339b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USA2P2248825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e7e9d42bef90b00c40da3927ecdd2a68c61733c8f6d9fbc76d4a3b720c81a8a. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USA2P2235534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9137ad28927c1a8f822f0a6f6209d869831b8df65d18786dbb2ff4fcf019d2f0. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USA2P2235299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x719330311e54d0be858e0df51301d5b1e2078903880b6d2b264e282d01117096. 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/USA2P2233732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19137c9088e241143f61ea847e44134c9a383cb954d40d3132a631f9c1c383c4. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USA2P2107916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1aca1fb7bc1625473e62c92a5cc203139d536fbe3a8ebd6280c5cb4a3fc34a8. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USA2P2108766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19b649ddb8a5ccabed8b1fadc2a4578980ba391f7083bc114b31e0943216e838. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZ5AB2145233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c9f54313ad695dffe120a6281dbeaefac0573f0ed935e1b8be71c8738e0ddb9. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZK6M2451544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2ee81d03844ae87bc340b3df1ba7a903b3ee71795ca5c3e9f3d458abae86664. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZHN82443728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9abfa90848b7b76abbca16a3cf9f150d834d5f0dd7a67fab38f2cc094f4b015. 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/QZDA72480681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0a8882f1168c8737e67c9d87e2a09cf90f8edba441c06848942d19ee885d08d. 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/QZDA62421488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bb27a9e479ddbfcc830e125387880d60a11ad679c33504af8bce09c0def76e5. 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/QZHN72395515.