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 0x6c21cc246ead484d223b31706c50f710a40bda2fd1582ed005557ca51d486baa. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e9889fdc-922b-4eac-ae00-afcf53f941ed.json and https://artists.proofprofile.net/proofs/artist/e9889fdc-922b-4eac-ae00-afcf53f941ed.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 0x0b59848f645553ecef0f98373a6714f5aa6256469dbe4fb7c1c091715c386b11. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/GB5RV1700113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d93dd9c6345fed5fc52bdb5b54d4e7c841d8c1c6a54b52aae958324d0a35a67. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GB5RV1500100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbca22d0d75860ae42087bba0d077e17b472f86d06114a76673415a0b5b78cdba. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GB5RV1500102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc38e077b498910cc486ef8403e12e8a31f9d2d3451b03e4c982d25125fff6a56. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GB5RV1500103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55562d5af7f1f92eae5ad05c009344e3fa8d73bfbb45ab66913861e535705602. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GB5RV1500105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8791bad3f59b6f4b6c618e9aae41c42da22b880b95cfff1b2038bd57738be56a. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/GB5RV1500106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9763d8a3004c2c475cd30120adf0eba96d3a1292e7e0982c570f5c870cb51918. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/GB5RV1500108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25737db410d09882903507aa8715db56c6ccd3482aeb525f30f76d4b1069134e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GB5RV1500112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ee204c14f32e78f075c5183b3d073b07a8870a1a41bc3074cfe94267abfbfaf. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/GB5RV1400065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd66f59ec649db61637f67eb756f6dba30ed450e06efe6c165c81e69baf948441. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GB5RV1400064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d09f693c5e12d2988debbe53cd9c0468a0bd09d822660ab3cc92477af9deaae. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GB5RV1400066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x622c4b2be917ad36822cae386676c9ca3acdfab1df970454eac06c3aff855ec5. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GB5RV1400067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50e0be1d511d95c852563e27804c7c711294620926363ad40dabfa7d8312768e. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GB5RV1400069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea548ab2650c1449e4464fefdb3a809d4354b9091904892541edab00c23647ba. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/GB5RV1400070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1334c0c25d89b1cb27646f86016b96d33bd1b944a79049b027bf26fd165bf0b2. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/GB5RV1400071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd22da131c43cfcdcfbd97a0e5c33cdfba9be03415770db3376c7500af882c5ca. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/GB5RV1400079.
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 0xdd55aa83d7b5a03a8ca716b9d307edf64eba735e52c559fb680a22cea6e0c428. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GB5RV1300037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb11c3b447c614128e6f14252f0e1e549b9ff586c8c29602756a5ad941b143e2e. 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/GB5RV1300039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x200bf534376a2e89a3ea63582732841320242c50a7c6bb78bf833c994f7440f1. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GB5RV1300029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45d9f41fcf8d79b56f41ccd0e9634bf8688a7b68b46b796a0ded69b2f73ff759. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/GB5RV1300031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99b2b23e20b38908cee0468517f7df3ca7ae5bed890e1724e7d3ad7250f6fb93. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/GB5RV1300038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4494f3197cc79e0466b076d3c1662ae1565552f5a96155d16db98ffc6ad73a4. Chain 2 (Bitcoin): anchored in block 960330 (2026-07-31T00:58:21Z), 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/GB5RV1300040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf713e1cf55d3eb606ff741a4cea911c446f2aa8d6ca5ee673049f3561816866. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/GB5RV1300041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61a96d2768316170ea780d5152a325b450bef2135ca9d1a443ac88cbbc2b3149. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/GB5RV1300044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f1dca5ef3a1a2d833fd4da47315448aa1137085c8a7c4d0487deb671c47ebd7. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GB5RV1100017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02d95d497dc05eb7eba72d4f0ad5bf859d34c84ac7c6748e56e47cba927dc616. Chain 2 (Bitcoin): anchored in block 957304 (2026-07-09T12:19:34Z), 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/GB5RV1100018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5242f1b1922646ad2d5ce156dc6bbc0683f83e655a471639f0d07b6d89b6ae8. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GB5RV1200020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ad89d4ccdcde5d85561204f60097eba60672b0d11b72ef6c20ce128e237dcbe. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/GB5RV1100016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3d09c2fb212e0e3539337ab5e241e8bc4eb0887d32442f102e79e4d4e4924fe. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/GB5RV1200022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d4737b749dc0db2a3391c0004695db357428147e4ec9f0ca2491241e2feee65. Chain 2 (Bitcoin): anchored in block 960387 (2026-07-31T10:06:30Z), 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/GB5RV1200023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc64c2c76cfc05432dde7371e40e89634417b2bc6d48bc89df6ecae19a1b20d1d. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GBMJG1817453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54c7fc641290e65c18d2ebd0ec5b2a7074d7ae961be1e3e499ee2711179e1aea. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/GBLFP1840055.