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 0x61d43c2f7797689d1c7ffdb72a4e6e39db9cab3c49b52424d543da4a985018ab. Chain 2 (Bitcoin): anchored in block 953678 (2026-06-14T19:23:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/62e64990-60ee-46dc-bcd8-1f8697f52341.json and https://artists.proofprofile.net/proofs/artist/62e64990-60ee-46dc-bcd8-1f8697f52341.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 0xfdd3035436ce7af876e8efea913bddfd0e5efe55c7e998b98b2b17e9aa16e8bb. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USHM92525889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96220ec2054ed420de29b8f1b434b79ff5a3c2b23764521dd38ab84c4d504d6d. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USHM92525890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2780558b9a268eccccaae1b10ef7a4861ef4754c4745a72409565a5180534e0. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USHM92525891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9b4416ac23cd489593bbc7e66b0b8e4100cc72de6e51b33ad47bdaf9ebbaf81. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USHM92525892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe997d294a45696c64cd1977682bf76397c0495b8edc533d36eb4d3e73c4a1f95. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/USHM92525893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x720760a0f76bfd76e77269e1f34975b61246a2cda6e19716171614a2cadb4a63. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/USHM92525894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf354d71cc2cbfa5d920150dcc09991be4381877f874d710c3e0116f530b63576. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/USHM92525895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cf6fcc1d22baa02b3f51e8735fd8b4da002b2107e54128586d0924e12e5ab6d. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/USHM92525896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f025987f73e7b71bde3044991cc0188a2460f0c7ae023a641a46e1d434d2a81. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/USHM92525897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fe6f345f9988a4b6d22e2a7fe308bd93d735c1e90be94828dc996338f575f03. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USHM92525898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbda7bbef151a6387299a770f70a06300762625f771f3245b792e0c410df4e241. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USHM92525899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbb0853fc6179aaf6ee0bf16b2a36cede8ddcafbc8b5421b4e4a4336c259e103. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USHM92525900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2efa8d3e4f145cdd8bc1341590c8d1653fc7c3363a0ec4a933f3986592a9efa8. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USHM92525901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe69b01c4394c460ca29fe55b914d376826099504879366d3bf1ae0bd5fb9e35d. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USHM92525902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b102faf9c0e3ca50ad4b07a38779332a92d26e6efa07c71ca086deb283984b7. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/USHM92525903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3fbcf89ffe3e83ceaf3179bad78a5d927fce0162998ec3b8fcfe01343e29ebf. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/USHM92525904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeadd453c70681bf8a310b4538ba6d5bffde4fce4f3a46692a6302253b7b4533. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USHM92525905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb4b31f88a3c6fc5b48bd96bb0fe73db00a7c5e06f21061fde792ad3ef83039f. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USHM92525906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf35317aa517d291f1f8f8e748920ec9a87d74eb7f2b05dd07534858f825d3a94. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/USHM92525907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0077adf518ee8a66d219358370e138cb0ec75178f39da51755862d3603517d9. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/USHM92525908.