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 0x8e38aae80ca9cae9b779ac5629745dd54b6c435da9efd32753d3b33e9738de31. 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/312ad0b8-8dbf-44c9-b1fe-d79379932d16.json and https://artists.proofprofile.net/proofs/artist/312ad0b8-8dbf-44c9-b1fe-d79379932d16.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 0x89356ec9e0b9d29a008a9e4244f0d2d7e60b1fc8ae4fe0517ada62bd401f3b20. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/ARF060600521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2f06f54b9c321125c3ae99c534c3449c61f15d311297dc03548c99791ecf758. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/ARF060600522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf2c1f32387674adfdbb1c1515d45b035851495533ccb4ad61cd6f7235c1182e. Chain 2 (Bitcoin): anchored in block 959063 (2026-07-21T21:45:32Z), 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/ARF060700996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89b0ef777515dcc95c16c75322b4d1009e72926c25bc604da49a476aa12ef077. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/ARF060600527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeccf7aa74b92d87c83622b8ec178cf223f04e71846a428b3f10a3661d11b545a. 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/ARF060600523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89546141c4b0914f8737d155c812e46113786aecd048292ad4b834bc8e93278d. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/ARF060600520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b0715cd484539f970f00f788d15040e127f5ac83df3d83da86e644575bcd9f7. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:27:19Z), 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/ARF060701004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaa0bcc67c6f5169a8967e223a8e6bb08a56b8682582905be02ff7734677110e. 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/ARF060500653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b4fa76a90bcf8541d64181410f0b0ccf73d8266c35471b06c1484613711eb9e. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/ARF060500640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x127b96c0d70f77e2b7b522a0f8b3a166311c573e82f287ddc661bfa0c1ba6329. 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/ARF060500644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10515d232b33a1cfd451c9ffebf4d26363223c460f0cc6685c6c0903aa471340. 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/ARF060500645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0709f76372faf6e07929328f65e3c616e4bafef4abd3516949310001f67ae17b. 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/ARF060600519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcb9ba834a476e0d3e555e667143085cc43ec55400f93e518469a4963bc10268. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/ARF060600517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b4fa76a90bcf8541d64181410f0b0ccf73d8266c35471b06c1484613711eb9e. 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/ARF060500640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf2c1f32387674adfdbb1c1515d45b035851495533ccb4ad61cd6f7235c1182e. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/ARF060700996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62d4deb49c5d310702f9c70cc81e007e6f7acbe8c6bf6ff841203da7c119da65. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:26:38Z), 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/ARF060500652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b0715cd484539f970f00f788d15040e127f5ac83df3d83da86e644575bcd9f7. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/ARF060701004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89356ec9e0b9d29a008a9e4244f0d2d7e60b1fc8ae4fe0517ada62bd401f3b20. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:17:28Z), 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/ARF060600521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x127b96c0d70f77e2b7b522a0f8b3a166311c573e82f287ddc661bfa0c1ba6329. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/ARF060500644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01b6a0f6efb5dcaed0f5ff7d1dba2a8a03d633618b0dc7611bd7a7827a00c598. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/ARG992044934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb08c2615d7ab3e912c94a08cf0ba059880f3bce2e86b26bf09448cecffff57a. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/ARG992046666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64d3726d7a8ca86d4d3bf821d9712de47e3899c9653ccf825bd18267921878b5. 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/ARG991026163.