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 0x1c725d973c88d37e6c0fe02617fe29b8b18620662cbde0b1a48bf863878d9833. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2146a312-6b73-481d-b6ac-b46d5bb73700.json and https://artists.proofprofile.net/proofs/artist/2146a312-6b73-481d-b6ac-b46d5bb73700.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 0x0d8dceeef3328680a71ff78d6afa8cbcc4bf5bd05bdcf8f00f68d2ea321acbe8. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QZHN52004336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa20d8890baf6b2707b9d962f765a379fa4b22710d6737c9481cee6093edd7e98. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZK6Q2018845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a25fb9fb9fdc1138dcc88d333044cee488c60c32674344aa46572ceefe4fb2a. 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/QZNWZ2021534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6096e041a7af893fa6bb505db1d69b744b27ebe400c88f7a8b0e0d5e98c73ae. 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/QZFZ22144220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0640264ee933e9a9d820f53d8c0db9fb0f8a8664495d998376e379fba590155f. 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/QZES72104537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebaac70734249ff58076b687e738cff6e5ba709ff4890d49199b9c892581004b. 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/QZHN52119016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9e51bac1bcee6f85b6c9234bdafbc7b8fcbc211a39d911b5387014bc25515c2. 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/QZHNA2144440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82545bb17917c5742a6e10e3965ddc6e8cf4cfc6b3dbb3d1bb584a960bdcd9d9. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:43:57Z), 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/QZMEM2154562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac9802623eed2c8709b01226af0f59c1a91f6927c8d98438479b4f976602af95. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZMEQ2166521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa16ac7815fc012161e8bb9200c716fe0fc2b9a279f0f2b06449aa10816bbb8e0. 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/QZES82215524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e18a1dc58f6e7d73833c33ef0ce49216dc9abb3bdf4691b3bd7664be58fe688. 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/QZTB32256593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2765956fb3eba3cb5f686b538018150a434f016fceff901c0c27877c1274f21e. 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/QZTB32256595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52ba658c3526f4480a5e1130ed3700a92232cefce7f7f178dc0fb0d6a1ee64dc. 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/QZTB32256596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31dc6e942f975af553b807753b0b7deecba05c464b0c33c86fb29e937af50d8e. 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/QZTB32256597.