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 0xd02cb452de13935a8129579c1b1b5fdd9c030af987df54b26a97f2467eb143bc. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6369a086-eea9-4292-884b-9606d039a155.json and https://artists.proofprofile.net/proofs/artist/6369a086-eea9-4292-884b-9606d039a155.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 0xe435370d4d2a9a74a0e1a9b4d061518eb38a53ae2cec59b30a31b886d9a689f7. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZTBB2414635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30763e5b4c4bcb68521999199d008bca340e56bacf81a568bb33f87a7045e356. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZTBB2482271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2d1d01826e538197abb218854c1bb22171999015a6dde3cb81b71dbec8adf90. 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/QZWFJ2457326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb6a06d7efb03843ab15cc0e99dcac318e4fcf6fa86e5fb2e2dddc789b630a1f. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZWFQ2489237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90f8eddaaac374cc0f1c88ac37b024abc26481c6dc1468956613a8ec1f09174b. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-20T00:26:47Z), 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/QZZ7M2476121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e87c7db4c0d45562c70e58611dad4b6fbc6ce5572f67ee3be07038be524bc9b. 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/QT3F42464475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eb953078808719740ec32a7f7c4bb2a3e469a4b4c146f4c0d1aa9d0429f27b5. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T02:04:35Z), 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/QZDA72591479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10fd62d86ae9bacaba3ef58096c3b0479e297f2e80372f91bdc10001c68b081a. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:44:45Z), 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/QZDA72589418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ddef1dec51e30e3d0b21dc3c7b4b71a1315ae4bff353af96ec92d70268f3221. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZHN72520966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e768cb3fa0bfb2bec7a31880ddb57586d3710457099db6b54e22f8ad5e45e24. 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/QZK6G2541852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb7dee7a9f54aaf56f2f4a1dfbcea9016b29de735c36ca6aa18d3a99ab80fdc6. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZNWT2562431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5671229745069360c486744fe0cea29aeec7c9aad510a39eeeb4cb0827d727ec. 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/QZNWX2501878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93e720034cc5d817f001578970ddcaecbd9a1d6c74566d479bd14a5487bce9c6. 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/QZNWZ2549861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb571d249c534c0913687c05a3bcc31d9fb93db9945285c0802f1c94bd1957849. 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/QZTB72513318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7797ecc969a9dda83d633db92bbbc9bc3c4748684b40f3cd61202f975ce437b6. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZTBD2503328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb297225727c15cde296728207ce251e74687ea91b1bee770175e5e33d719040a. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T06:58:09Z), 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/QZTBD2503075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7efebe8390cb50a9d8ab0c06bd9491b5fa46ab15adcb23dca7e87caae6462a71. 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/QZWFT2536957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78a2f9dd5488a52e4948e95274d0d3bc0075b5af3448e3ede630198837b9e6e9. 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/QZWFT2539765.