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 0x798d395314efb529b7873a05ce5f1394996d569180d8d7be043429fc4a8ceb40. 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/0a11270e-5821-451e-a700-d84422a16da5.json and https://artists.proofprofile.net/proofs/artist/0a11270e-5821-451e-a700-d84422a16da5.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 0x3dff2042d19c49ad6e4556e526c92fe7d3acf9f999d91d350bbd5bf9325d021f. 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/FR96X1518328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5107ad14b977477872615ee56bd9e62e8a0c5d81fa1f3451d14a67534465e1a6. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FR96X1518331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1cc2cb32a1390eeb0ad0d35ee14377ad0f710cd4289b3fc237b533b4c1cc01c. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FR96X1518333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9099e0b429bbc880054cd70633970e0349dc7083a794979eeb19059d9f25d7aa. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FR96X1518334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48bf12e02548828375bc560a09c22add4da9d93e99fe532723ff9352850b5420. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FR96X1518335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53460e5f2b60bfe92e5bd34127cf588b789a110935e340ce75a94bf015fdc077. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FR96X1518337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aaaddf1c163d45b11108ddf4c7ce00adbdbe76afa5e486534463eef704fa95b. 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/FR2X41724029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe69c4a6d068f3d760657cc78d16634de4a22abab257bf6223fdc3a4ccb8b408. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/FR2X41724030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8acf02d765026b1887946328d532898d1be921948789defcf5fd30d4479d5a71. 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/FR2X41724031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec6136c778d98c916b8c8d9af71d73f70fef705aebd094ab8ecc11b8e40d1b79. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T12:51:21Z), 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/FR2X41724032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa42a0a210567e0f56dffd146f9ceed3e84224b24ada9ba19957a0ec9ad87c940. 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/FR2X41724033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c5b65b6f96e76ef8cbf06d5d7fede672fb8f63b711cac1bffd239700ab71066. 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/FR2X41724034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4c1ec0b56868af9c669ed2879c2f629028fff519ba21403f08a9648582b5e6b. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/FR2X41724035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x872d0288e61c09cc9c89db60b585c0c778805ff0ef96009c2b962fa464bd7af6. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/FR2X41724036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3b7e3b2feec45202fc2e09183defd26e0f6e413849ba79289f25a6242b5a1ce. 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/FR2X41724037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x205a5e811a7f2d818156acfd6956a58b256d20af967c37080476de50d36940af. 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/FR2X41724038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdea7ea2dd2ab46b55743937691951f2880009f8636f0aedfca4ebe1ea71d7b96. 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/FR2X41724039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25cab74c093cf2527d51f417f44337bc6d22d61dadd969b79fdb4422ae76e519. 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/FR2X41724040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3264ac7585d0e491b27df17c21239cc32b4392ad045fa9357c4623f06fee362c. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/FR2X41724041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa62b225b5b5e7159f05256e1bd1d63075a5d0d40a1aa495c128427dec7e4e8e2. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/FR2X41724042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53ac6cdaeada855564f466094aa940d5355dd36d59a0033cf6d62103aa1603bf. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/FR2X41724043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc783b0566f5dc784f3fc76404854a99f7399577d2d5001f20e030a59c60321c. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/FR2X41724044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddab05aa67f7155ba9f06ae00eb31d185b49c48e87840a42db63ab53d089623e. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T12:51:21Z), 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/FR2X41724045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd78cc0623de17f47547abd54f7a6386769a7652a7cc3e5a6ab12e43188830e42. 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/FR2X41724046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x916337a93a8cdab5351a9013817b93e2fa97395398fa4dc8be9e9fdeddeee2fe. Chain 2 (Bitcoin): anchored in block 958625 (2026-07-18T23:11:57Z), 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/FR2X41724047.
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