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 0xd1e638bf865acb4c36a30d924bba4ceb88c26e3be50c79d3a05d1b1309ea4ee9. 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/8485323f-0497-4b9e-8d4a-9331c53df5a4.json and https://artists.proofprofile.net/proofs/artist/8485323f-0497-4b9e-8d4a-9331c53df5a4.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 0x5e2e167e872a2d41328efa39b3c7c4c6c20ed02b022cedf7ff5f2977171d0502. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:28:33Z), 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/QZTB22283988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x374caafe411b96fc728da36613a5ef6337fb5e87294c010799aa54ac57fb3352. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZTB22283989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3423b18d18efcbf7d1d83ea0fa883f33ee5e4b76e5217c836d530970c068d8d. 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/QZTB22283991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ce56fdb50db92e73737a0976578c973adc3bf9d2e6cb7dec3aabc2463d6d1bf. 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/QZFYZ2338273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5d9cca40dd7d220db196e2ef4addb0648e300344038742d2d11ecf9fe013df8. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QM4TW2420811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7ed8f3c18277d27859a7c8348b3ac1fa4624611ad72c2c3acd2a5b7d2b9c5e0. 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/QZTB92510750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5bc770e3c2165bcfc2013ed6ca69eab7d2ca7dc81c5ac8f6edfcbee80ab417a. 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/US38Y2414162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9368a824de13a26f3e3c80410069aefb015241e4f2c01938ed18fd91a8ac6d7e. 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/US38Y2414164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ab991406c699204e037fd9f107c30c4b165768f9b21115f191bf93ef97ccff6. 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/US38Y2414165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47f63292f1f7ced1c22f3132b901f0c59eb122643004d10a669777dfe6cbc6cf. 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/US38Y2414166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccf4922b28a6108dd75bc0aab69013638f67609d300960ed1edf4c97ff0c3466. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T15:53:24Z), 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/US38Y2414167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1750b9e469479092a6718a3f8dea2e023d3ce3686bb88012a9b6ff1c3a9885f5. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/US38Y2414172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3937b989ad0ab78585848f6c9bfa3f69c5be101cf1e0c392982fc10d75a1f2d4. 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/US38Y2414173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1b8575ec75c6235108cdfd778e3c5faa33677875c14c13f23d008319ddf47e9. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T18:11:26Z), 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/US38Y2414174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95c539ec2a8fe74a4f74e00569966b3aba584cf3c88cbb5d6de7d49b16d6f9ea. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/US38Y2414175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98e72a8c93927b892a7f759aa76d6ba2b5b0113b4796f53dcf6e0e4dee5f15fd. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T14:12:47Z), 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/US38Y2414176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26e656b9c2bc2f7093a1f07936c73a2038ffcc43b680ffdaab807c630069944a. 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/US38Y2414177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08c6d8e772147c53deb3e2ae0744cc7be7026ba81878912642babfeb33aa9cea. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QM4TW2420809.