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 0x2a9e7434f0a6e18535b785decc14e9f250a828fce3a188b1b3b7639bc6efa34f. 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/17e42c90-75a5-43dd-90bb-18acff64d57c.json and https://artists.proofprofile.net/proofs/artist/17e42c90-75a5-43dd-90bb-18acff64d57c.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 0x06f7a85a8f0ca6391c286ffa5d107169646ea3a0a85bfac5b3b31da8431a079d. 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/BXN6X2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2520412cdbed417822a783066d365f681a72eac25886016d968c8325873483f6. 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/BXN6X2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbef712b00eb3eef84ba49898e7b373b070185efd91c25534e6ec635f0766d81a. 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/BRNQ01800010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a462fdfae28ddc4a499908633b1b47bf13956611ca5400157d7fbf1edfc42fc. 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/BRNQ01800013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60a7cda050aa990fbee2f7912e814cdba1afaaf0c4c5e91521a6eb74f8012e7b. 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/BRNQ01800014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e3c7d9660894bfbc02ce9018bbd8b8fbf100c3a257e6300d0a6dd604bd3afbc. 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/BRNQ01800016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16ccc35e93f5d0e1fda808842c38ba0ff6d1daca1209aaab737adde55acf1050. 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/BRNQ01800017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8ece2595ce7796bd06985a71fcfe9abd554e534197afd1f27d56526f2cc25cb. 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/BRNQ01800018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18cb9949f668a467840b11b3927231a789c1be14c2a55aecd5d0703fbcd8c137. 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/BRNQ01800019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61d084cbe9b3af858a99742b4801e94ebf400d03eb71a2dd905d533a16977a0a. 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/BRNQ01800041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9091bb67ec9ac755c81bcc6a7e057c54347b5b1cd2a3592f76d4f2d1d23c48a. 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/BRNQ01800032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10364bc1bcaa52598b048bb48e7df2d4e0e2a489bd99f80908f1782fcb07f1da. 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/BRNQ01800040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44e67e9b34544e7e22ed06e4e4bf435eaa64f98355a44ab5f3c41fb3ed2a326b. 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/BRNQ01800042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x997baf1886fd4e71997c9e7d56dc6667fbd16ab8c5c380bd1215434320e00f11. 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/BRNQ01800043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc9374c1ba963126c774eb7c8c78cfdc8c9d4cc00fb4b0dcf9ec4296db5a00ba. 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/BRNQ01800044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9310732a7b5e6979fa12a8f3f3a1ba68b515e7bc3a5a975045633ca31363974b. 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/BRNQ01800045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4b43f727f0f4b400a00a3a6b751a0b1ad2ad4116f36774070e263f420efc460. 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/BRNQ01800046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x071554411e12270dd6ef32fc51df5e4495a26885be6ac8986500872d2cba09a6. 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/BXN6X2000022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cfaa3d001341f9b81f9adeb0f0a36456536a66931add8fdf12a760c0902ce59. 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/BXN6X2000023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb55d658c24cd1d076213d3597f12a46f577c77725dfa8410eccb208199706d12. 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/BXN6X2000024.