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 0x475093bdef93b01cb52d5b94764007fc9047080871421996311c5b115db82f0c. 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/3ace49f1-a784-4f71-baf0-efdd17e8539e.json and https://artists.proofprofile.net/proofs/artist/3ace49f1-a784-4f71-baf0-efdd17e8539e.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 0xe1c5a48165d6cbcd156c4e5ef7a15bcf1d774344861ccbc9399aab6dc6799daa. 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/TWC811403001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a579ecf9fa86711698ab70e3660be569f8896ae404bf186054795db9f97c78c. 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/TWC811403003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c768e85f24d05ff0e46a0718c8c0c73afa14321583c4b3ef7363dbb81b99468. 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/TWC811504001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6429a0ff2694ddf5a60c59412f20fd5ddd37b4e4eb9f8fc85fae8bdbae4c628. 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/TWC811103006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6baf7c2670d659b4917e361a74448736b7c6d278e6a8bf08860df1efb34004c7. 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/TWC811103010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb19cc75719c749275e55988ce353bb1e234437aa46043f64fc00e29b0019a33e. 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/TWC811504006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8259130713cae9475edb127071e872297012ccd7e430534f66d16231c1ef8703. 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/TWC810505011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e53ef96d6379410a2eea67ebd607a970dc85dc505a021184832901ab7813c08. 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/TWC811103003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d0ea80e11c3b8b146b97d35b8e69fc0947ea5553c23a74827e355355a9a599f. 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/TWC810505002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57607acbe50eaed19f90a084f5397cf3ac4262ab722f7201735896d2f6af87d9. 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/TWC810807003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc639971bff039c8b05fb4ee8c13b6ac09132bb69f63c6dbf0031d133fbc261a. 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/TWC811103007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e5f75a8c7743c6e2a533eef378e2f4792267d370ebf268353740dd19d6256fe. 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/TWC810505005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6602d00f28868d054398990dd1e3fb518d806e51b25a12f0b6eb5851cf5189e0. 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/TWC811403011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d7558a1a9ee0b0b4c7be672addc7a45ea88389a51fb0ccfab5293d80584d23a. 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/TWC811403013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x253c84ca37471ea4af74c200eb6cf38b8752e221a45b22ed6998cd8c3b8105af. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:26:10Z), 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/TWC810807004.
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 0xde9f7d53b88a52131c69187fe5a2d72426434683ce45d7669f1c4afa99456340. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T19:04:42Z), 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/TWC810505001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e92d7c65d53c006af0f1e9c7e060ad99e2674feaff4474c460941fd0d2b78af. 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/TWC810705003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x939973045628f5b7fad3056b59b8d739430eb15a5deadd2bed41d51ba22b7e2a. 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/TWC811403004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x598cb7865613af180d60674019ac2221ee0d55ba5458e004e1365240038303db. 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/TWC810705002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb727d546e6481400c41aa81a57a122f870dc5ccc44a370e3306e0c41c01da39. 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/TWC811504002.