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 0x023473f25682eaf0bee101b169db2bf4e5ccddb91be9cbead8c8a0069e5b0654. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/44e220f3-6aa7-4859-8692-8d15e2ab93a7.json and https://artists.proofprofile.net/proofs/artist/44e220f3-6aa7-4859-8692-8d15e2ab93a7.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 0xf923b5e50cdbdaae507b6485d485d1710bfea8d6edcb85bdbf0780f21b3d8d76. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ES71G2315167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68f0b851877e5098b19de1a229f9adbbccc07a60146c0162d73dd7f5a67d199d. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ES71G2315172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb829da91422785b8953bf831fad506a22790d349db1ccb35e20ceed47af01642. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/ES71G2315165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc62648ba4555c010525c03e703b053f7855a4f61eb6abab1e8fdb97371522904. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/ES71G2148837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eb56c685ba61ef83d1567630afa6253508af0c6ae7a57824f1175276c880359. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/ES71G2315168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeb297a068f34f12886ca44b5322aece3580aa88567165fd4d49229124656c8c. Chain 2 (Bitcoin): anchored in block 958042 (2026-07-14T18:24:07Z), 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/ES71G2418004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe111c90c7c1e3324c9f2d77cef3e8cb93f0e2c1a1f785515a52d40863932e88b. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ES71G2332486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6b971c8fdb35a592eee1c8da0fce8f40450429cb674157a3084e02a00c9e767. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ES71G2324985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdd108051e3e188a1773dc0d69646f0b74c6018375f5528823b6a5a363977af7. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ES71G2314591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5618f23bcc5033badd4dbddd9988ebf6e454685cc3f3fa16cc07b1613df54c2. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ES71G2233443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09fb97f8f0444cafb1df03b158fd09afcdd72a428a651699b61b6734021d9c3b. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/ES71G2128856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ed53f2458afbe86363c20a6b6df589bc1d8818b14ee4c27d66c7b15115d39df. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ES71G2128855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef5a1ffb8ca313804fd6d4ddd367ba15110ad614da1b88b8c602515a9cc02b82. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZGLS1958972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b57e84e2e089b76c2470d3ff4b68abded4f2e2592a4716b3a058fd1e24e83f3. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZ5AB1859854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef2f55b29c9ce6352e0caafc7bf395e87eaf2be1a1f3a3e06d1c620c324a0587. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZ5AB1800900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x384426400872716fa312a0e2a47fb3a9bf445661545f657ce596be574f28f4a1. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/QZ5AB1800896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81c8a5ad16d66ca1906cb7a1e65d7ca3da21047a92108f7b05413930f97e0273. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/QZ5AB1800901.