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 0xdea7e506646d33987e5e370b80bc2ac530dfc442a6f7e9e2ab211041507abafc. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/740cbfe1-5777-46ed-811f-99c02f2fb2d4.json and https://artists.proofprofile.net/proofs/artist/740cbfe1-5777-46ed-811f-99c02f2fb2d4.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 0xafc0cd8b9ba75d65997bc37cd5abdc5b6b04c1d85264b698a181de542617d1cb. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BXVIH2200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfca7ffd81fd7126354fb5fb53673e0a7f392846e65fd2509d834f3152e7804f5. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/BXVIH2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fbb7048bfa21a042d57f2c4586c3a12a5d905f1b0a48673fbd67d1571753f3d. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/BXVIH2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19c9eb50b3628bff1cff13608c7a408d96f1a5ad4c73ec7db1987c83f53ad4ff. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BXVIH2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1daeec3476b2b358283e7a88c6202867143c669af68448bc0e81c37a0dfa91bd. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BXVIH2200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65ad17cd51af00bc319bf243092374e4bdef6eee7c5655301aaad4ac9193a15c. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/BCU372200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27be247a7c328f8b3e2e605373f6bafbdf746a14899e75db689541f4c1ed8cdf. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/BXVIH2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe41e280262bab317ef5054f6986c67bda35ab57a3c55c073d57e3c0b1f0413b8. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/BXVIH2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0c1941b5d33904c1668ec72fd7faae9c16331dd172373479383a2a0025d74cb. Chain 2 (Bitcoin): anchored in block 960210 (2026-07-30T05:21:45Z), 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/BXVIH2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x296e4f6b7e23de718764b9db9bccc408a2222aa39ed8d507f1c678a7294f0770. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/BXVIH2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43055a368cdb69b4b74d17a1d6d8c034ba7b4f2f28e217478ff337a52c2ab03b. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/BXVIH2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe453ee9387780da262611f93752eb887b9c159467e979ba780738ec53fc58f4. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/BXVIH2300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9a826dc0ff9aa443e416b273513b82e28da2e4d3d33449d94b854572c44f35c. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BXVIH2300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81414a59cb9dd41a6bc7d87517ba9ab2ffe633f6969da077e61a126746111d04. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/BXVIH2300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41d62f66d7f5e99c71623201ad0848d3817dccd6602d690700e54f72b0e9b0e4. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/BXVIH2300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1f02014f1af16aae5da3e0f328b7a1cc5ce04bc6cb8837d2172bdfeee69147d. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/BXVIH2000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21541e3b515d448e2a01c738ea08ebbc87be49a5af38b48f6dd99d8fec903440. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BXVIH2000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10077f056c9b948cef4a063940f48bb2591a17bdc34b4a60185f1acf2e2c1bb5. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/BXVIH2000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1876a4b2428bd35a80665c1aa67e9fd17c3c2e9ce771b1911e277de4deb9751. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/BXVIH2000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21541e3b515d448e2a01c738ea08ebbc87be49a5af38b48f6dd99d8fec903440. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BXVIH2000003.