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 0x0fa222bd7d6daff666613ed035f92de0993940fd8388909973af0f5ba04e762d. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cfcacf43-a462-4ad1-833a-b7b0f710b4f5.json and https://artists.proofprofile.net/proofs/artist/cfcacf43-a462-4ad1-833a-b7b0f710b4f5.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 0xc3a9a0e629bf4f48bcc0c991e8bbe73e567972814ede5095b0e8e479484d6be1. 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/QZMZ92198953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa95e27a98818a0980b99846325e5d694f15e046059bfd0b8ca9303e3cfcae72. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZMZ92198956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56fffd02c3d9e1d742f9135c9018ccff4043b4bcd5536a9ade95675c4b1978d7. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZMZ92198957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x026f8e35a3acdea9c96eade052b3574de5caebf4cd46c5bbe898dded5a9996d3. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/QZMZ92198958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02fd6a04f47dceea78700b8d5f6c78d561f600e6d96ea26c579355b0181cbfdd. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:57:53Z), 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/QZMZ92198959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b56f19af83d9b93bf5ca1e0386120981355c019abf80bd319f8da2992488b4b. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QZMZ92198961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x922a7078204b668b83d6198895c127322ea52068c80a93eafdbf2a773eddff54. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/ARF060801680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88f2bf95c7b2e038a5f73d189dbd6c50b1243224787461302b15b3430cbd233d. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/ARF061200084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda600acff37aef68da9f48d9acf07f1fd40f193e47aa614c14236dcfa1cff091. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/US3DF2288841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffc5d41256dcddc9ff98aa9030fde5aceaa4d63dd37c38c7d59550cd008e3554. 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/ARG991000590.