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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e4306a7413bbdbaa5ada9e97c6c8af59fec084fabdd0ac58d54e8710f0ef295. Chain 2 (Bitcoin): anchored in block 953783 (2026-06-15T12:24:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d6859347-4c0a-4226-8f45-b98e2cd44854.json and https://artists.proofprofile.net/proofs/artist/d6859347-4c0a-4226-8f45-b98e2cd44854.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ed5642bfea29d449c543eb8c61b06e0b92d5166b738dc85ce7a2875fb2f78b0. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/ESA012561779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51508d696c66422bb5a0e0d7e61f0a2517d0d07be6bc50c01ca9d4e6a479db00. 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/ESA012558694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03f3cf0668ce41ac4072e23b5465388dca504bbd72aeca810f9c428a68cc9e8a. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/INT132000564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17ddcf6ca2a99551780193cec0bcc1efcb727a464d556120bd1db98d1c287cf2. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:34:47Z), 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/INT132000565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5832aaf2a8f6960751e2c84a20b7ac61dd7823bf42b0fc1138069f46eee45c9. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T05:43:57Z), 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/INT132000566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5115a52b57dbcef9a84c7be9dcc642b01aa45515980c67621b03cab44030a8fa. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/INT132000568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe31d8e45b5f6e9ac6651921a2dff1ecc9d29005896bbd87d2ed52413608a3c57. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/INT132000569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaa948fa66d4f4f7d458e26e4667363610c0b07ab616558cfbe2bb91a06e7fc4. 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/INT132000570.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeadb4623c26d0501a85f44e36503802169d31e1cb5ffeddd1d61cfdc2f310074. 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/TCAGY2367103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6de800a35ce4ee7f0ee7d59c3f855c24b13ae0ed1a9ef4eb6bacf0287a0901e. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCAGZ2375220.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x389fbe753e84643ac586f8cd7d19f7bbd82d4fe110c116a6e55ee1be683f5851. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/USA2P2342480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8389b00ae13e3debf24e0757f7762b101fd0627b861a3ab9c80d2d9290dea28. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/USA2P2342448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5883a2ffff1a9e461bd108d997934d035abdaaa28d3163a6f4d65671da380f0. 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/USA2P2341486.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe317fe94d59e670040381cccd6fad605d2ffde3706ec1a1232d1b6a9c01169a. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/TCAHE2354919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cc4be503204657b789adbc51f736f67806e7f603dc329e4412d8dd6a8b2ee0c. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/TCAHF2306508.
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