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 0xb390eec1a5a21d4160ffacddae80ce04b76b6572d436f573e31420d81056fecb. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e339f620-716e-451f-bba3-420b1ed2a5f4.json and https://artists.proofprofile.net/proofs/artist/e339f620-716e-451f-bba3-420b1ed2a5f4.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 0xdf0e23de876086dd9a98f4a4ed35575ed86b356c9eb828cf4bbb876b48b4c96f. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:52:20Z), 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/QZJG51722935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69e9c4ddb4a6f6b61a4cb09c151cd76d4db9da185db00bd2cab88ef1c3158636. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZNMT2299091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fbf084b54e4914fe87d0f0b2bff978bebd30484577dbf0f7d16cb4a3e2e2031. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZMEV2493106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2399127147a73d0b3f55069b162e43b5996bccb791a536a1da5950134ac60530. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QZNMY2444780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe764b80caae9eacc5ca09cac368b533d330d748583589465e0ba704efb42fd7f. 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/QZJG52529993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x235b214c084efff5ffff1140c154280ec95798904fd024e97e596aea785c5bfe. 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/QZL382561645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x248bb865b9aff6af2d268f13d17f394eb3624be4fe68e76f83f0b1744851ea5e. Chain 2 (Bitcoin): anchored in block 957761 (2026-07-12T21:55:15Z), 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/QZLL92592174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ea1a1e1c45e0bfb33caf4f786fe94bafe7606af021b9b2e53311cdbbad72c9d. 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/QZMEV2543780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9b31c0339be7100a4b3aa0c3f09c4ba68813684b0fd18dfc4088b2d378e3c14. 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/QZMWW2571049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36d4b1407c06a408afe21e9f8dc2a5a3192b497965ef7a6db5b0eb9b39be2ced. 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/QZNMT2512547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x002072301d8ee9806ba7204aa16fb6197a8a180474bd0e7b42f8e24c686b7de7. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZWFT2475657.