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 0x033d47c7be3eed1e8fb089267e121e9c92e4bde83626dafe173dd1ababd45901. Chain 2 (Bitcoin): anchored in block 953750 (2026-06-15T06:12:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a8da4cdd-cae7-4316-a35c-7fc8580e048f.json and https://artists.proofprofile.net/proofs/artist/a8da4cdd-cae7-4316-a35c-7fc8580e048f.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 0xb992ec2ffac0516b6d013b62d856f1c3ad64b62d08c084c13870823093f7ed45. 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/TCJPZ2459499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x487073bf66cb764ee80636e489e2b7ee7695bdb55a9ebfe3b669f91eafde80a9. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:52:03Z), 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/TCJPZ2459501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x680a526f356c44a7c1611c4e68e87d190cb4a88e3f36c8019a1fd27ec96c66a3. 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/TCJPZ2459504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafe27bb4b96b746db1c17d4a9f07f80eb375222ba75e752e1bd10f45e6a3fc85. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/TCJPZ2459507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0caed392bf911587d8180f17eaa784aeb944927f9ff30ad43c0b5fb6c744acf2. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/TCJPZ2459512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd782397a126b5737475c08b976061d16b585ef3f45856c160353c36a48c583f7. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:11:03Z), 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/TCJPC2407928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb10d0e16c08f3f67b2b31d46fd90c8d98abea828591d6fc0fafe7f3c7757bd87. 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/TCJPD2420961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7038eb95963722c2132634386e651597bde17c01ec9a5d643460f7ca9358d652. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/TCJPI2536455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4b5d076fe1f69c26ab8bbcae85c7fe5a59caac357b89bf21b3917f198399734. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/TCJPI2536468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaffceab9efd54c4ca8a6d501a1e41610071d5a3e88d6d42bdfc5bb05b8590256. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:57:26Z), 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/TCJPI2536508.