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 0x12e6c4997f1a7982b8260c768130493bcf7707f3fffc86d1e1c48db659da284c. 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/268671de-5267-4314-8f55-1cfe4b19c500.json and https://artists.proofprofile.net/proofs/artist/268671de-5267-4314-8f55-1cfe4b19c500.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 0x2d66d4fdd3ece23ebad78250860692cab64f41df2a52fe6a83053f4650427d97. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/SE5Q51700403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x160d356d0f639717f6a02c440d17a9d987b48e278aac3d428c944689f5d917f9. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/SE5Q51700404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc85679df0c6ba4a27c152492973c55197013fffa595e0a4e9d774c4a6a92d074. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/SE5Q51700841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7525e6179b47c0d56c1d22b87b652f9688aed8d5a3450301156b83108758854. 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/SE5Q51700843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56ff34b6771e55fd44be8c8d7c0c9447fa31460d139e50ecf6805470c2933047. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/SE5Q51800054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95c0cf5c40b42b6b08b8523b9a2f8a5d16be0c5512a4bc8f20539cdb549a51e6. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/SE5Q51700402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ceea8096de364bdba368817895bc51117ee1dc811908b9100f4d8e14758f0c2. 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/SE5Q51808877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d3045af9662511767935fd7375bcc37ad67437368b395590dd658931d2f6b91. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/SE5Q52102750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f3ac0f002e2fb44bf719cbe9bcdd50c2bb7cc1ab86e6876ceb3f45a8d3661d9. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T07:27:09Z), 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/SE5Q52102743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7403d15962c870d2d51251e5e3bf1e56f88cc3f9d1d25f51d5c116a16b50a4f2. 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/SE5Q52200347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x736d0dc80d928b04d26a65d01aa2be90130794fa9c28482071e502cf3c73a747. 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/SE5Q52201683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c945324b3f8406464d4ce02df300cd2f4c93ec106422f4407a891f6980a9f21. 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/SE5Q52201607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x003ef44c9f6389916d4c2e7f6a58fc039fa0d0955475e02356e2c3397bae71ae. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/SE5Q52201679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cacf00e47b8957f824fc371697f06c0dd61e9f92aee6227f227b7c3ff160f6f. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T05:55:09Z), 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/SE5Q52301440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1e034064e3d3c4e00cc0f30f3d329b8807f1746552317ae8fc2891f5313c4fc. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/SE5Q52302588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59a62903835267d306acab2632e9edf0eac1a9aee23ebd5dba2d8e4a6af961d4. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-02T21:02:00Z), 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/SE5Q52402374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x612c05d98cfcd399d35e82846385cc6d6a5518e23414bbffd1b650705d071f11. 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/SE5Q52402515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d171964050db5cd0a117e3a0e7e9497814d69c60f48c55c13024ca30a618d8b. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/SE5Q52403752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3da547e0494178b9ed98329a397862a2f37a20fb715b2692005004fb4d745fff. 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/SE5Q52404035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f4e9003033cb5f449557a564fc0270292ede04524765ef9ebc01971a5bccb9a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/SE5Q51800884.