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 0x46d0d38b39f1eca31247a02973d21371da39a34eff49f1a47581730e2f8ffd62. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/696a0a49-89d6-4e54-b2e1-706870b174a3.json and https://artists.proofprofile.net/proofs/artist/696a0a49-89d6-4e54-b2e1-706870b174a3.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 0x8d8d7b1039434eaa7e0d7776ed56c94e5db8d2e2cbf7d24936809617959579c2. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/MXF550806705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95823885149b957bdc7b557741b25e38b048e6633d78c206d4cd9dea15c00967. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/MXF550806703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebb3abb4b30e7515b62fa365edc7c96747f4d4c779ba5daa2ed2099bba1cc003. Chain 2 (Bitcoin): anchored in block 958963 (2026-07-21T04:02:02Z), 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/MXF550806687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7025460f90452749de22f5206c225eeab401614afda37d8c3fc7d39765499515. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/MXF550806695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa14146eaa3987a85f4a5469435a6f14a7782302fc1585132fe7250d3e8c714c1. 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/MXF550806704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92107ea822f779c6ef9c08e708ff51211f5c7891c4d212fe76c284449514b93c. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/MXF550806696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4a7b2ae6d4e71f0b0392157f6c3d4c468d52b47e54b2078ccd22a956c89cccd. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/MXF550806694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbab9411378e77d74148a8c3f208fbfced8f7f9d915e4157a2f38e6955f9d47e. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/MXF550806692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd181305b35a49ad6b5a4111180a8814c80a4fe5203966029907dca3b74a9531. 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/MXF550806690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9accfa472e8bc591015506347e2f78b85eea51acf3e243f01b6139a5ad34bf7. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:44:14Z), 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/MXF550806701.