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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 0x9f61a7721998fe021ca98c7d533354e323d0cba5b579b4901a8d4a15e897f2cc. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d131a7db-fbbe-496a-8be1-c1c9d2714077.json and https://artists.proofprofile.net/proofs/artist/d131a7db-fbbe-496a-8be1-c1c9d2714077.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97c1e6c1dbef5e009ada1286f500fa6005d0db63d2c18da202882ba4c0634cee. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ZA87D1700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ee8e55b1e1713053ce73c88b6393de47901d7c05db2f06de85ee95132f6b47a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ZA87D1700004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78010b4b9fba4fcd8fd1ba1b7ab5257574d89750b9a072f3f3def017c882ea5c. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ZA87D1700005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa63421f8fbd1cc54c14cbefa2b6acb4a2ccb982c9a0a4e75f9266408541f9a84. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ZA87D1700006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a0ded276e0da6a47c3adff15900273d0f78026144775c3453dfb5491d13686d. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ZA87D1700007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa95b955da30fcaef379feda12c14022731bc63938ad2d451ff874c200d645a3c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ZA87D1700008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf90d4f9563b6763f4ac365a8cd37c9d33e8de3f48c530c7feb79f14c35450616. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ZA87D1700009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fb267134bc1250c042189ea98cbbcff1a141372393a9ff44b9e547225c98248. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ZA87D1700010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed5650518b3935b54dfe4f2da88340720489a0f41a0cc74bdff59ec28eab835e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ZA87D1700011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4de244b44cded37ae6dd85583f8c11d1e3c1e5b9a397597194743e201b9aaa9. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ZA87D1700013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7981d8df30a29bc185e376686bea98b6f923ecd60be47176d739bf8526bd06e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ZA87D1700014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f6048252fe97308c6c0d15e9c5eece16aca0fde707abc9e6d4a1685c4835a6a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ZA87D1700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc65aca330f4208f9b8ed00e77a7b91266f9dfed7c46d4879fd97a3b46824267e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ZA87D2000019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa005642f2bb2c4a8e794c067c73ec61df9ba4b88b2f461221b5e9f26a8111b5. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ZA87D2400082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x016b6f82b65410889da3b5f18d9b435bfe58bf9c52c1c0d97caaafe4b2ab3bcd. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ZAUM71802936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc228a69a65d7b3730b7c27001dfd8e2ba77151db5d3c3d1a562d05a919f70a3f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ZA0I41600013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29fe387fe0d9815a7110f57cb6c9b217949b0d8232ed8e94930974e2301ca682. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USUS11700033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a38d9070b748dd7fd9d91c0bb35164e487b7a08824c6769d1b819da527ab84e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USUS11600214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8af0263aaa4d7ab5ea2c3642bc37d0b5eb0d62df0135eb22a857791d265c6929. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ZA0W02400150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60248a895d16efdf450ea2138222db8c1e047bc8b72497217cb7268b50905027. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/USUS11700021.
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