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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x203a3425ee8eddffefe50902a37c68d9751cd258406affec343192e3227715e6. Chain 2 (Bitcoin): anchored in block 953614 (2026-06-14T08:40:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1804313d-d1a1-414f-a0e4-31ac2f214b31.json and https://artists.proofprofile.net/proofs/artist/1804313d-d1a1-414f-a0e4-31ac2f214b31.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aed2130d00e6a8414cca206947dcc38fb75eb7d931350b20afaf37a654430cf. 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/QZNWW2244943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeb2d1b6bc9c6f74bf5a73532e84abb9a64471a82009c4acdeb1b4e5c3cb84ab. Chain 2 (Bitcoin): anchored in block 958988 (2026-07-21T09:08:06Z), 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/QZNWW2244944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf61ab7b256b499c26bc20f6e2ee28fcac1bcfc45e551511db8970bb8e23b50f1. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZNWW2244945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84d0011be3e39220e306a5cec3f8ddaac0d8d4d35a91e6271845b596dd99148b. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/QZNWW2244946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5029df3ed9fa42e4f2dcc149ad643abc92e927b7249c57a66a47db4672c7aa12. 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/QZNWW2244947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cc45a50876d7da93b5fd23d3c6ca84cdfe593c92c1820b79e7e3b569aa23776. Chain 2 (Bitcoin): anchored in block 959026 (2026-07-21T15:38:13Z), 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/QZNWW2244948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f59f70ccae800ee7e3411a52f249f1e3c69204747a56b3aff26fd106722da07. Chain 2 (Bitcoin): anchored in block 959026 (2026-07-21T15:38:13Z), 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/QZNWW2244949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08a7901b6c47ac0bb4f32e1e7e2d09a6656e32bcfd734428440b624c0cc48f35. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZNWW2244950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf772ba27dec5fe4ab109370e978d5c763a7dbb9bd4e4a6c52249bbb23731f70. 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/QZNWW2244951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffa81fc4e43479c134bbef9e33b6f6df5bf9b756f305fb4ee338d803b55a2bb4. 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/QZNWW2244952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbca4f0740e52b9a1066817d8a2a8c09918ca3d145be624139e72f40b5e702b66. 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/QZNWW2244953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x550af89b36fad890b02138c03f2033f9153550cb94faebc4272269e1821dc3ca. 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/QZNWW2244954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb916dc67a0ec5802fc51b1130199cd9c38de9530a1835abff839b54992dfacb9. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/QZNWW2244955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce457defed18083a547a04498fa3d2b32603685eac99cb7deec6848f094c4914. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/QZNWW2244956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6115f7c78cb601b66e96d65223fd34b617e2c496695e9f834cf7916e3f13e424. 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/QZNWW2244957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5daa7eeb85f5c2bbc70e6da194232f482c46f5c2387b6c49ea7784a8e3d1d0bf. 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/QZNWW2244958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba903173b1213b6606ddd9cd88d0e274cbb6c0a3d7e05838ec1d4275dd137277. 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/QZNWW2244959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x303a3f5b803ca362c24759821ab671d85ef0eab3a1c65209482e12fa85d76cd8. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/QZNWW2244960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf2416bb71ea9566024c886655054d226618d53d137adf01523e965c98b016b9. 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/QZNWW2244961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9812f0d2d7fc8aba4253f79648d83a7acc177dae98e3577ec110c96a750299a. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZNWW2244962.