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 0xf95e327d66c8d11e0c538c0a134e17e6b2d6b536a432c98434f590de3654ed36. 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/7d4bbb3b-97ed-40d6-b493-43f0d0e1be23.json and https://artists.proofprofile.net/proofs/artist/7d4bbb3b-97ed-40d6-b493-43f0d0e1be23.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 0x2727630ce96fc4eca6f6b03f9c0b9423fd85f6f36e0d1e044afd44368b2848d1. Chain 2 (Bitcoin): anchored in block 956430 (2026-07-03T02:22:42Z), 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/FR2X41953436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe8f04464b6d87861f0cbff10ab307d66b1312f9ac171957f325dd274f5be073. 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/FR2X41953437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bffcb812ac1dfdd0b79e19fbba8e9903876b5f19b54cdb7dba656f69d77ea1d. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/FR2X41953438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0a2c461ed3a633b892f024428d149653d3a696b3bbf59137130cdfe300ae889. 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/FR2X41953439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x806401406f1fdf390b9a0fd138633befbb630dc40b8d1af1aefb6b77d6ef4612. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/FR2X41953440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcebd0f016cd676cfd6222dc030380d733c499708cc439d1b6615206b956a3354. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/FR2X41953428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2f6a6d6849377f8228c13531b372e2083ba0fb7f46c1285d65a931952818ec0. 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/FR2X41953429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb841292d4594d9249166eb75679470622552446448a8409351577a0d20254a7d. 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/FR2X41953430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5fdd02f6618fb3c537edf7e9b2a51f6cd4a2851e702b406a4f98cceb87ddf46. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/FR2X41953431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb300ade5fa5e44ebd922b04fe8315ccd5d397e2ebdcc9b919bc2185c8fa7e50f. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/FR2X41953432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6a041cae6acef0fdfe25c2dfc12a18483e6549f714423bca22d91a7c8fd6024. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FR2X41953433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88c42dfa3f62878b9cd3ea81e7d868612493440453246a4a1ac9404bc635b303. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/FR2X41953434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21088ae8c50ff66321ffa1df80dc03f0794560c09ed1c0fce905a451bbbcd539. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/DEZ650802757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b5c55a9128805eca8d7c7cb42c66d83a0c32636e8a68f0c5ecbdd79a2a08e29. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/DEZ650808662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x562048b4456d22a978c32ef97cdb39728545598d6875b0c6a375d304cb669cdf. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/FR96X2051418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ea1748b4a65d69f12554173cda8bb70eaad6949720ad2484a044aa4a1d0457e. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/FR96X2051422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x805a70664264a9811d471f81847ca5c75bff0a7b760679d87f6bdb0f31036836. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FR96X2051423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d4e398afb0b4e6be29744451052b677483dfe0311789434718fe20f565b98a6. 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/FR96X2051424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ae2a4470498da55c86d190d82c2efaad3a89ecee187de0b79d7f80e4ac80de3. 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/FR96X2051425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc41e54ae35bac30015ff2cfdeb81edacb87e04e7f6a9720f2c926c6ac0092b89. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/FR96X2051426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbde24c29e4cf591a58a7a566b239b8ef1404ef3d2c564578a44bc3db6fb45c6. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/FR96X2051427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a37d1b305607197ba35b30c22e1804b58f9026b0148c20b844d737b2f5ebe60. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/FR96X2051428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7516aebb4bed4c1e2dfd9554e6f462b0e4c85532c0e713363af928f000b69129. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/GBTDG1302829.