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 0x43118bcb89a2804bed1eae9e434ce13837843285b6897ec133927ce455c72aec. 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/54d8d31f-4b73-4105-b76f-ab637e3d9167.json and https://artists.proofprofile.net/proofs/artist/54d8d31f-4b73-4105-b76f-ab637e3d9167.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 0x64b43ccd34869c7110f6d10c0bb732422d77ee98bb7ec0763f77f976d71f93b0. 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/SEWLR2308801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0bdb84baa22647cb633780557ad120ed51f177aa35fbb535fcab0087148a70e. 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/SEWLR2300301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79b3a3d493c365928350d4f0e30c1b98cd96bb6aabb65ca70c65f698c833dc24. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-17T00:15:41Z), 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/SEWLR2212002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x204fc937c0a6bb6dc7a576177c5e2c3d8761135a11e63e56abef5d769fd74a05. 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/SEWLR2322702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7395a605fb6fd9136496ea83f69d04a8b40cdf7f8913cfb04c2886b5ef1f6764. 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/SEWLR2322501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4f0cbefc665acf2e4741cbce88f90443825b0372ba3ce25681a96abf7d2396e. 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/SEWLR2217901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfca25398ed23d9c03a4d05c9ffb8df695431cbf178bea8fcd0a37779e4c4acd3. 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/SEWLR2300601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1a399bbe46ddab5600a4a085f3158e6d110e297f23a030c48fddc5156aa1e0e. 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/SEWLR2300501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x680ccd4701d3f4e842b5711fc27fd0b871c548c11e2b1dd16fc5c335b70df1be. 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/SEWLR2322401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d6e5bf101e2ceb3a1d5cc76d25ff8ebb0521c76d9ea6558ee6a4a1f90acc64d. 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/SEWLR2300401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c533104e7625f3ce4d9211693d3e470dd6e6e8451a2e530337c4d6e244c356b. 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/SEWLR2212201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf008df3138763cee4a90af014c724f8ce9643e8ea7a859adf5534a0ad1ea38da. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/SEWLR2230301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0bdb84baa22647cb633780557ad120ed51f177aa35fbb535fcab0087148a70e. 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/SEWLR2300301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdce47b8044af4c4d54e267071db3ed2c243f422dd629a556b6f5397cbf64219a. 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/SEWLR2322701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7395a605fb6fd9136496ea83f69d04a8b40cdf7f8913cfb04c2886b5ef1f6764. 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/SEWLR2322501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x680ccd4701d3f4e842b5711fc27fd0b871c548c11e2b1dd16fc5c335b70df1be. 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/SEWLR2322401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4195e980cc4fb76cf8264eca3bbb0be300cef7458b37b04e5ae64cd3a63e899. 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/SEWLR2322601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdce47b8044af4c4d54e267071db3ed2c243f422dd629a556b6f5397cbf64219a. 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/SEWLR2322701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x204fc937c0a6bb6dc7a576177c5e2c3d8761135a11e63e56abef5d769fd74a05. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/SEWLR2322702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c533104e7625f3ce4d9211693d3e470dd6e6e8451a2e530337c4d6e244c356b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/SEWLR2212201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6dda2eca950335d660a91a9d8823292ba2c3c20316f198ee63b4ab4c22a8b1e. 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/SEWLR2408201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e0be858ff331870da3ec87815a9f02cfc9cb70df18eda554e971e975b60b357. 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/SEWLR2419701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd097c2387e4a2e0dbb1f5f60a3ff95893c18da6a500b7a93c915ce0be303c3d. 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/SEWLR2410201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa14a9673a545f06fde9618086cd2f2786c944501e92dae49f04a6e1e341d3c37. 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/SEWLR2413301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6f63176b76c2fc48d0dae115d31b06a176ecb893dad7433df757263933491bd. 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/SEWLR2401801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff5cc0d69434d51c703f19f0a62799fb46c079add11f5523fb0c9e0e186aba2a. 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/SEUM72400623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8193e90408ddbb052b132247a17abcdb28cd477cb131d7a6d7d5cc7845580bff. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/SEWLR2102401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc16208ac0f0073c4f5f07835155cc88b54037aeef13d0893d1a09c4e7487c1cb. 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/SEPQA2400168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd672fa229490abaaf82a2bb1c28345eb19f350d587022dbc29b1fa86662ee36a. 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/SEPQA2500081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbd4b9526f830ee55386e3f26dd6a2b8a77c6ad2ded58be6191a85c3f9ffa74d. 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/SEPQA2400211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef14c3948129d9d9409923bb752f6387d462a5b8d3faa498dac9ba2515ad9963. 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/SEWLR2426201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb273c5ee8815a6b45de3fbe96acf0f6ee95ed24439f971eb9ba95c30a36dd3da. 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/SEWLR2422501.