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 0xbaa6669724e4fcc3010a116f1ce7f52f387f4f6020978926df1f8f9359f0cda0. 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/9fbeb803-89f0-4a95-bb5a-e9f4105f4395.json and https://artists.proofprofile.net/proofs/artist/9fbeb803-89f0-4a95-bb5a-e9f4105f4395.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 0xef0eabf11f3fafdc415eca0d32053b511d740a3738da64f11043db0847ffd8bb. 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/ESA012235807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x765f309a658c72196c94a26f253f56ce406990aea6b4cdd067b79c641de4dbaa. 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/QZZ7Q2416433.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ea81b593321301eeb2ab9b169e2174d52cc741f7c487ebde992e6290a83ef54. 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/ESA092304535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x648a817df25e8ebd8d2add1ad2d67c564914bc242613d152ac678431410d53a3. 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/ESA092208640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64328836e076bb574b793008a288978902ca7d6af179959159787763f334452f. 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/ESA092304536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6993bc3388c4a5c433bb97be75a5ee1a264465a527085367a15eeaafb5f1b610. 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/ESA092304537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5428a35d7aef52595f078a0e93523a002baa047664475445717a645a9ddf1df6. 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/ESA092230859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe58f104a6e2b92e47533bb2fc95e9ddc66468fc7e796ac597d1ad894ea48823a. 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/ESA092204783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb14ca0a5266f459cc2ab5858c7e05fc1a7776597d54719db4682717238619b1a. 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/ESA092304538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabd9da0ae04a2a8f2d0c5e52d4be84ecc9744a8cb3b8bdebdb496fe8b45b917a. 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/ESA092304539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa14615b06e8533be2abc146a9da12aaf3d024694c9f0f7731c4d94f836cc854f. 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/ESA092301393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x618a686d4741048feffeb85c95a7366edcca5cb6d36d80749e73b264469166b5. 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/ESA092304540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aa3b367edac6f9a083ce462a63f92d954b18ebef3993ecd8dda632b35fcfb5f. 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/ESA092304541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe72717991487dc7afaf471b620dc1f35e8fcc836651194bfaf7424845fff6c91. 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/ESA092237398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c5ba9c40a6e30f674271b66a633ab156a91c22d77ba99f4a1638c592e300f65. 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/ESA092304542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7908c948573fe914e68df5855aea897b3bd168ca40b1ed6a2d053d68100da47c. 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/ESA092304543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfca8261cfd4e4ed19d36222989b09808e63294716e7780a46b350c0dfca5e144. 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/ESA092304544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14301b88465c0fdc5ee0cbb0f04ca2e94b8240dbc7f630a8b0a7eb88d835451c. 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/ESA092304545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4b6f92f117ca37e656b4180d85237028cf8903fa2fe04ac216e5ed68c7b2778. 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/ESA092304546.