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 0xd74b77c93142422147f703817460b057d4728af8afbf81aac12a25b2de10784c. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c3e86ba1-cf67-4d61-b66c-1b2a467b770a.json and https://artists.proofprofile.net/proofs/artist/c3e86ba1-cf67-4d61-b66c-1b2a467b770a.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 0x027be26c074e57c8cb7da49cf0f5966af92cce78da0bec8e59dd4d6c5dab7736. 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/FIVP90520041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x207df3743743c38301fdccc9621280d170476f9eb61cb9ba855591020bf32d00. 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/RSA131364301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb5443c1aecf94225bd19fb4315462f98165e727f6120514c381d58916eda5de. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/RSA131364302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb8d8a8ff375128a8d90bb310ff3fc5af7e275d1e2496ff2645bfb18952feb2a. 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/RSA131364303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe380e50530c159bbaf9c58bcdda9208d4140b907b693f64371bb520f36e8d6c. 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/RSA131364305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca14818b5b2672d81ee4e0427bad451a1030901f23c9ae96fb06b0571ed30dae. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/RSA131364306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8c6a34764d968fdfaedffe00593073d03cffa0e2e54f843e46ba27272579452. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/RSA131364310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ff479939c0a38a664c426aecc3b7d8cc513b7a0a2bd08a8b35805ef0e625b1c. 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/RSA131364311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9666af0eddc0ef933743becd1004118c4d585afe18238467865bf32876d0691d. 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/RSA131364312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x475936ac5d4e058443b9ca59fd268266d1a6af9e9940a462700eba65f3832df0. 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/RSA131364304.
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 0x852f276b2bd98a4ae11af61dd8d102e60157c6a65ba07ca6efb785e093c29c78. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/RSA131364307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeb276e8a81f7c9680647fdb6da646a64f2bc0f9da9cbdf4fbe23a58f0bd837e. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/RSA131364308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06543fba27c3cdafd37e26fc389d8c8d8b2da9fe21d19d9b7b69c9bec69bd40f. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/RSA131364309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa411568e7456097a31cecf54a6da1da7858d06a1e6c4a89a5398b77ce4c442e8. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/RSA131364313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad834c9dd7e0baf31a9da6c14142592eae90284b62034ac9eee6ec70c1400203. 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/RSA141300483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf21bd4110dfd9be514f936fc204d0f63ed71a93a6770a9628093b76c7520b684. 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/RSA141300489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ad9855d48304bb051caf71ba47e109d77e6a2de4e8a2b7b1190e99f14693e1a. 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/RSA141300480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd23002a7d35413e32edbbccce21317bbaf42e0e29dfb3d9ad696996abd0863b9. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/RSA141300481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6b545d00b1965ec7e0df8b2730c1b2ff96ed4299cc2e63a191a05bf5ee3df2d. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/RSA141300484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2d48d4be0f5e89bf0f1f8cca25c4162530fbc54a5271f2171df32529589705f. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/RSA141300485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23e9c7229daec8988888fe9746ccf8026d9755bdb9b6883dd4855aedd64d7c6e. Chain 2 (Bitcoin): anchored in block 960285 (2026-07-30T17:26:40Z), 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/RSA141300486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8393ca35aee18c988d600557668e32af7797a6c5bc49532d5627eab9af6feb3c. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/RSA141300488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa726d3fe91c2996546451629c6eebee58cb667313e7ff3d515d36f8471f9a72b. 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/RSA141300490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b96bc7701fce506eece032d7e81f257b9a4bb0eea0b4d6dfdfdba783c604343. 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/RSA141300495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcee96e8596f6aaf7f634750c22ae89a1d4a59b6a7fb8480524074b858241937f. 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/RSA141300497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf0a63171c005478153d319b2e1ff9d3874c299f1920cd44130e03f4941ce1f8. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/RSA141300500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb336cb547947b2e964ede0d90269a2d6fd04176b5ca3bf52da742775fb2f68f. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/RSA141300492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x848a268ac6cc21f1fb9d5fdcf8beea7ec11d08c1f405b786055e2c35f4afe507. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/RSA141300494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2da0f4847969e08ff9a304a83f8a01b3821d9802136dc04753e657b9ccf4afe8. 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/RSA132501302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8c81e793cc1897c4e53c05c222d566490eb4e0b4c7efa3fef7e60fb9e9a9239. 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/RSA132501303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7794e78612373a0949ecae0bd7b67710aba7123d8e3a49b9e1caa1bf2b246f0. 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/RSA132501307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a322d6004aaab524b0a8ebf4b0281162399a416bf159db7f28ca22f512cb5e1. 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/RSA132501309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9e1445571c9414f1cf5b9b41110fbe7c672761323fd254a042d50527707144f. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/RSA132501301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5ae1f0d3164b41f5d5a6fb411d58502863b1bc79f39f8553ea6913a0d56d3e3. 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/RSA132501304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa233fb1b9771852d997e577d7d9d590a0e3ce20de5e0b174ef768332796f31b3. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/RSA132501305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x531b26d83244047ac22394c8b97ef2f44fe2c22d62112714dbe366dde05a18b5. Chain 2 (Bitcoin): anchored in block 960173 (2026-07-30T00:11:40Z), 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/RSA132501306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfd95444422a6fe5b33ebbfc306fb4e25f0ece04f49920a2fa08a3874d79506c. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/RSA132501308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56da7f986f0a6c3812ceee2c731cb98ca6e826d3d1dbd7370bc5a855ffe6d293. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/RSA132501310.