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 0xae1c3fef6828b0bcd735b979fe70f399d8d53d5ea71b061f7103250ee480d758. Chain 2 (Bitcoin): anchored in block 953667 (2026-06-14T17:49:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5649b448-1fda-44a0-8e0c-64360562107b.json and https://artists.proofprofile.net/proofs/artist/5649b448-1fda-44a0-8e0c-64360562107b.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 0x6a429407c28f8b1ea69090acf42e31c7f2cb95d2c3dc6e79bd036e232f97a345. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZVEM2557188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x918104b0b7e61cfd2935cdb2bfc4927b80385c066dbd56fc16b914e9808712aa. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZVEM2557189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ce20b7a8c03e31da53223afbcfbef3676546acc7c1c4c87211fdff8fe77a7fb. 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/QZVEM2557190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe530b90be981549f908eb940c47f74ca5c369da6241ceb78d9c2683e03b1a771. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/QZVEM2557191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe177896601a777ad6fbdba6eb5ea73f5f03103eb4b97503224fda9341aa9a2e4. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZVEM2557192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd99fefa68ee1f85c94cbd0418ec38f6a0c1cf2529f84260c487bd249978cc74a. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZVEM2557193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02efed326d146a52589ab39af1e5991d414e6cd5863f71f97aa7924cb64ba8a9. 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/QZVEM2557194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x120a9a66ce27cdd4762fa99be3f2c76c390906c19d55543e333725f2385b995a. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZVEM2557195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21f03ef8e2fd25b36e5af310f6b381f656c9c3afc102b2288def3c341aa9865d. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZVEM2557197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf189d4525ed6d98064fd07a807ac453d88194aa597d54f138f831d240738ed19. 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/QZVEM2557198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3290cb36f800967f7a2012a08a108cb3067e3a3196188c140577ac8f966a3392. 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/QZVEM2557199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2374b627eb55c24bd710951b0b4489ba56df956d2e02cc66c117f109b6c3adac. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZVEM2557200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd08aeeed22f3b762af21ef27365e5373d5419112f43c68419f4d1ebdbd21285. 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/QZVEM2557201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6938281a3d82e478f4bd4c31802c5a82a13c88f0fb414d921b34f9438e0099db. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZVEM2557202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22d797326222c9d0036505abc1103f7b668a21bc2e5f4b7005bcf54de1c2c5db. 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/QZVEM2557203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea48a79388eadbd9e1ca6124336011310604d452442288929a00193624ea5f15. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZVEM2557204.