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 0x96d89c6af9f7e5b51f0bd871b81132a2c525dd900310f6c0d0d5cda13aafbf5e. Chain 2 (Bitcoin): anchored in block 953750 (2026-06-15T06:12:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ac3689f2-1ee8-4b50-9aff-3e68ee9fdef0.json and https://artists.proofprofile.net/proofs/artist/ac3689f2-1ee8-4b50-9aff-3e68ee9fdef0.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 0xdc3d434d82f8079470e4e662c357c8053b8896c06d20320d774a52aad4989807. 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/AUMEV2157276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14a8a335f287a688f6e4e7c2b101afe69f011dcd2db5182930e2ffa95b4a32a9. 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/AU4J12300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92abf79232b7276f3760bfefb337b6fe9d4a51d9fe3b6ee5be8016ca8a1053d7. 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/AU4J12300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0f63a2b9b78ec7c9d14f6e98b1e3c9efbe79d43486d6158f1f145fc8b269c6a. 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/AU4J12300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd070308aed0f1c58f75ccb13678f3759b6c785051849c4682feb555fe0eae18f. 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/AU4J12300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc04c17c0618a4966ed3cefbd42074eef5cd61c9ec06e066e7acd1316c32ab85. 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/AU4J12300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f99cdac81d4ee3a5cf63766c39c2030a47de7762313ecd6519d511debac268a. 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/AU4J12300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9df59ea2ecbe225b9d64dd1fa11bdeb3f984f75cf6fda5d40ca95a05152d5cfd. 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/AU4J12300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84c44bd5d10751351a0ac44d13d802060362c2ab66f44b99c9286f479c84d166. 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/AU4J12300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa299b57549388871c516dbfa366f5247c0c76fe115620d4ee4bc1571ef811f38. 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/AU4J12300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35446967d18bdfe6284dc836aac9efb32abb342d6fd08f95893d5e49470e96d8. 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/AU4J12300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50793d78495ce28c3174167c8d1cdf55253f383e4e6dd31e61f73709ed9e9c6d. 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/AU4J12300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xede54088f750a9179f3c85612b0503882c3057b9723b78c7cd5c19503b461638. 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/AU4J12300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x593ed8eebdd3c8ad4b771e15e0ea7c4164bd6e4a10bd7eb13a4e9503b526f224. 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/AUBEC1828373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15316d869b26e76d9251c86d6e5dbff4476456b7dfb9c6ac1ff4fc4060acbe4b. 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/UK9AV2301585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d3adf45ff6868d927d0701b5a8d2120c11a2abe888da422ad6c7e85db37369b. 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/UK9AV2301583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x728d5546b1b2fe44720205e09575a9b57c1af54bcdd8b188479a939113e6354b. 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/UK9AV2301284.