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 0x15baf9bf741b553307aa31fe2f6d6b7d51c16b09b7914efe2f8559841696c185. Chain 2 (Bitcoin): anchored in block 953645 (2026-06-14T14:31:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3ee0bdf9-509b-4c93-84ba-b3e93caf10bd.json and https://artists.proofprofile.net/proofs/artist/3ee0bdf9-509b-4c93-84ba-b3e93caf10bd.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The shadow of the light stretches on forever
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 0x7fef04f4024f010d86b5e37e1cc83fbc6cc633257b96f8300f2f43c62133b182. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/JPW462444929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee89bdfddbec49b424e4dd61b5afd9605a98b03edd85918dbbe2c0cb4aaa8f9a. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/JPW462444930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c4e91b5aad304b1b99da75619b2a5ef64ee5cbfedee87870af502059c0800df. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/JPW462444931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07dc2ffeb3b1ba98481eebeb36279ee7d1846017b38c7bd37648641bd801fec1. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/JPW462444932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5ceeeadb1a32714e82e0a8052c4ec90015dc21fb5e043e3e3c62db75c10ad73. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/JPW462444933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b1fd7f4e3964e2c03e4961d3eaf0c12537cddbd953592346e02191768b15b04. 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/JPW462444934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7441511572dbf9c85ef3624db47e140d9938bce17f78d1870fcb866b798f1cf. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/JPW462444935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ce5f3ef4df519bb6ca2790fb91ad40721b2c01e256f6b68b5a3d5f7467f0bcb. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/JPW462444936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f15b13168f64a19d3577e2c771f91e75eed8f9c4f7138184b21e6c074b0bd29. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/JPW462444937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x735fa00b7e7b03681b1ddbe0b5b8ae838285575f423dca6720f320a3b00b9ac5. 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/JPW462444938.