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 0x81e2d3d08506ce51129250f4a19f9085dab37a866415caa1450afc9ac80c4de6. 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/bb6c0e66-73a2-4b8f-be91-db0311e5e1e7.json and https://artists.proofprofile.net/proofs/artist/bb6c0e66-73a2-4b8f-be91-db0311e5e1e7.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 0x62844a96251a14c2c019952672fbb71c9e8ab41829683c225836489639fd1df0. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QT65W2504013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeffdb4cfbaed3f3e88d8ec1009b953dd8b634f26a9638a59b7c3f7017a145b06. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QT65W2504003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7354de05c360e0fd6bffd3f3e23d46b0e827c4bf75133408e6c302b12e1e746. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QT65W2504033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9841015805c8d913c7dfb2dfc103786687dd7d1851cbbf143fde360ebe27a2a4. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QT65W2553468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedde4beabd49f7b40e02b27869d25920eb5553fdbd1ac5a97cb446c1f1561b74. 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/QT65X2564785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0db8999119a645146ad67a918dc337d65edb0263a95028c0a7c03443afd13a84. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QT65X2564857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0df32cd54151edc96ab042713975173def90844505c0642d246aff00a1f7be72. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QT65Y2534222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8c41c028a2403146abe41e691ecee186f85c60a42f422f8de4d90812e1f4238. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QT65Y2552938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83871e1669b1faeda945037fb7e2704426a4041e708e2730b1359c88d3ce1c67. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:34:38Z), 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/QT65Y2564670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe393ed3fb8b91587928ebb258bb30b511fc955365b9ddfc10c5dba6633e18d02. 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/QT65Z2517600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b2b51065149afb1673397c32a47833aad39ac85b26489dec02be1f808b37e32. 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/QT65Z2516302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa22c78b33b4a604de00ff8e49d78705cc7b5ca26217f0261711cd34f44e57b84. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QT65Z2544664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca65b9aeed6b95dd10410a3cf7ce379ec632231ffd1995992e8379a01009038c. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:55:46Z), 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/QT65Z2589729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5814d36be8d2e2a787ddcc5fb11322534eedd8c764cc9dc3c1ed74d0374c12f5. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QT65Z2589994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8335e0a94058406f8c62457a0a978d913ba3482510502abb7e8a88a4e12d48b9. 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/QT65Z2597018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb4aba17bee97c57ad6452b3f43435950d4e9891c8e2d66e84299a609e130f47. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QT6622503202.