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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x745046f4c811d04a2b7945e3f6cd32919ea775fd7260542c2dad7e21c6d01596. 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/ea199605-b0f4-4057-a7ed-a6596d46aa8d.json and https://artists.proofprofile.net/proofs/artist/ea199605-b0f4-4057-a7ed-a6596d46aa8d.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x886d3b366ac4f718fea891e099710eb30816d9bb838f823bfd7400ecbdb2b754. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/ZAGG72000031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaed708e815f9dbd42af1de29461130aaec23d52db03a16a261ab66aa37bdef9. 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/ZAGG72000033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56ee4e3098f1fa986ad1d81bc78ab224c66db3f10991ab112330f0e94fca41d3. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/ZAGG72000034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17d21dcc01b0cbb42eca2804433474a6115c706c01923975cb02402b5ade5047. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/ZAGG72000038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3a26594f4bd6c97cfdff1f8ab90ad16733bdae16fed0487d6289412d42b2ca4. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/ZAGG72000040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f3ca70c2b24b9a3dfc824df5cec6d70d425a3a3c2e245462396e7e912593ce5. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/ZAGG72000041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc21fcd20e4bfd7edbab711ca41212d8e1cc5dea50361d2624900c0dd69bc6cc7. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-16T21:48:38Z), 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/ZAGG72000043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9902e9956d36c56e46de5d01458bcaeeafd6af33e9997423a90b04a16792fbb. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCAGD2229992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f78dfd5be165df5cfc30b3a8b3e19d9249ce9041a1a81aaad6abb5467a9c11e. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/TCAGD2230018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4a2ce53eabb13b2746be423684dcc6d6f2265cdf1897b8179f045db1e3b1aee. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/TCAGD2230040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3106579de7a23b73fc827f2b35269f1ad2130f38ba7792d0ecafee9953be2b5a. Chain 2 (Bitcoin): anchored in block 958510 (2026-07-18T06:38:22Z), 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/TCAGD2230085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbef67682359ce99197b07c21f9970ab7c87bac34ce0a93167b252b0c12a1a7c3. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCAGD2230090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x195ee390df658eafed412b435092e00591c105a79dda50001f17f2392b5beea8. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/TCAGD2230109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64bb2672ee8c3565a9cb6824fa9e3d0b423ad87c3f948d9b40585f6abab45228. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/TCAGD2230119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x207680dabf169141b4193b0788fa08200abb2af5f335afab0935c20066180fe1. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCAGD2230149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1fc266b05bc03d6e86f5b1862a0d45e00e90754aa84014301ff4cc0762a4e73. 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/TCAGD2230202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf91edc6de55e282631e73f6661893af187ef101189b2c9c23cf98bccee411b24. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/TCAGD2230207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f7d40ef41673f25074fdc47acf7f268571c52d036aad7622cba9f01e1a9a1b1. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/TCAGN2289955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26f33e48e86ff561a3857d1c79638228dcb9ee59ca4cacad9600307c305002ce. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/TCAGN2289962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d37ad443121288ff9deb05ee97b87a24fda5bba4789b292095105e382979f65. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCAGN2289969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f1190a05cd05bf44aba539a0736cf0ff8e5f0d203c2e356bde39c615feaf79b. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/TCAGN2289972.