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 0xa0a56605fb1b52888593d0586de5bdbf7adff0c518a56e51fd84e119c06d4807. Chain 2 (Bitcoin): anchored in block 953736 (2026-06-15T03:21:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/981c8d10-bf09-4588-a273-5055b446ab81.json and https://artists.proofprofile.net/proofs/artist/981c8d10-bf09-4588-a273-5055b446ab81.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 0xdabfba604ab759c5b434c88a45ce62d720376f41ea8a2836276de39e6432c98c. 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/AEA2L2170241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5856e3493210f31271e8a424fd84b488dd537d36514f5ff929673b568a76849c. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/AEA2L2170242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cad4f20f1684938ac9849332e74678205171e7ca23d7a896959fb2710be80c4. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/AEA2L2170243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x943dd09163afa0192725b97220f43b7a692d6177bf41664a7afd2cc5aae15e37. 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/AEA2L2170244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ae389b349d6684aae7580364ec9e47684c03c228b7ab352edc7459f47038160. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), 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/AEA2L2170245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5b28b49e289c9031545c2733db968a0d118c982a0fdc38ecd766757aea1ae13. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/AEA2L2170246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabd93b2d46ae9b614d2617661b28cac1a620c3973e88e8bbe8f29bcae592e716. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/AEA2L2170247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x805b8d2e54e1cc1070792f2afe9fbbd904b4909c3f0b9ebfa5bd29efb2737492. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/AEA2L2170248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aab48ef4eb8bd9b2550d4112d63cfbffe73a3f5fd810bfbe03a0457e2d3ce60. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/AEA2L2180697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x030d2529ecdf0e44b921065af66a93f562d471724e62fcb2baef40230c5a172e. 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/AEA2L2180698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28153ed0a1acddb3457442551cc0206ef98fc5d88ea59867bc026f757fdf1b24. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/AEA2L2180699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43f8475d6a34aac99a50074acba9525dbe2c39059fd8d0f27f736aad39f20c39. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/AEA2L2180700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77d79ad09e6c8b55e692ea379d02d441091b509de3cf68cc3e56dcfa78e291d8. 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/AEA2L2180701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x418275c96ff52fc1f96db82eeec2825b1e544dbff17d7c572ff579a2963ef9ca. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/AEA2L2180702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25f5388cb269e6afa788cdc62ed206a2d8fea548ec02e51178fb5626cf22e93a. 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/AEA2L2180703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x336da8b0f55ec18d4eefbc8557d075184a24395120066925264f34fed467dfde. 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/AEA2L2180704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5d3763c171f3b6c8db6a050f9d348655306f99d5945ec1009d7afbbd6abc89d. 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/AEA2L2180705.