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 0x2e3102dd0a836f52e11fb275f3243058156b6ff2da85957bcfad5a1f988c30dc. Chain 2 (Bitcoin): anchored in block 953614 (2026-06-14T08:40:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/18312316-3505-4bf1-a142-ce9ba7f67740.json and https://artists.proofprofile.net/proofs/artist/18312316-3505-4bf1-a142-ce9ba7f67740.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 0xc33327b73d38225a1afa3359ff832a9802d1903fb021f58c47d96db519bcdf4c. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QZNWZ2228389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x418683c9aa539d2ccd9160e5c46c263ca5244ff6f7a34d03f36fbc55c72c63d7. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/QZMEP2320881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39cf29a785b9e56b7ff029c21a14b07fadf55498d62ee521f0796108f1665a5c. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/QZMEP2320882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x458dd43f026b7220b6a9254f4abc9bfb9f4cb69381bf1b4a95cfef45caf8281e. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZMEP2320884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa55a7c18464cafe9dbd26baaf75c2bf3835ae89c17059c841dd5a465257b6c89. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T17:45:12Z), 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/QZWFL2433434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7beaa02fdf335189ecbf66832af1fa57391b14c994f97af3185ccd944096a213. 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/QZWFL2433435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcebd1ad1b5731762e80b30d2474159fe1485a8c689631f27bfd67f6c04b06ad7. 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/QZWFL2433439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd23d487322ac85a818f68a975ddda997362ea5ceb86241e7389a430dc170bc61. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZWFL2433440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef09ee1bb4f4fcb12439d104b1476ad2b5a70dfc19949300f8ee790874dfacec. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T04:08:07Z), 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/QZWFL2433443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d96d5d7b5b6c4bfacd2a2ac913c598369a1b7d96a38efcfb05a49ae36291e27. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/QZWFL2433444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c16ac24e8a56126b85e8bd93ed222373b3d1e9bfe3cd579d387df87e77f82d5. 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/QZFZ62574943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x769d9701ed6061fcf11525e90253917d3f430140be9d013f71aa22f4ccac6e4f. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T18:30:57Z), 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/QZFZ62574944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65674000c0345538ffeb03bdb44b29f9b10f94da34ad3e5d827eccced0fc9513. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZFZ62574945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08170416c957da8375aa33937ced53f15a543885034cf95a10edf50232e3eef9. 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/QZK6L2519770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad3663c0ad86ca4394770167bc8c464242d37de3c0fa7a32c7bba801421cedca. 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/QZK6L2519771.