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 0x9488b8ad481e31718b9a9f4503480b435004152f58ea5f2f1ea4635daf7b61e9. 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/c26bd4f8-3f4d-4853-8149-43f7163c4949.json and https://artists.proofprofile.net/proofs/artist/c26bd4f8-3f4d-4853-8149-43f7163c4949.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 0xcb83ed039084ca9ac2830c4cd8dddb538457ce9310385449f6272bb4cf0fe4ad. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/BRA220709193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb525627464525acf40eb5bb30a9673a628a5f43ab71ebbfdbffb979f57e23f4. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T21:20:22Z), 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/BRA220709199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc6f1a23526d974b9e873ca7a7032bc1fc387c994fec1d56bbb1b609f40435c0. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/BRA220709202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9381ad302ab25fbb5fb402fe75678a2ad2bf4dc1f843aff246bb12fa6aa039a. 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/BRA220709205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9381ad302ab25fbb5fb402fe75678a2ad2bf4dc1f843aff246bb12fa6aa039a. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T10:46:12Z), 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/BRA220709205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b6f22243f036baf0c5e3132a6ce61690fc4201464892c2b4b0e9535111a2e75. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/BRTBV1100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72c0490e39688d8e937d6c2e2e093986ea6829de8df9c3f897ba0d2ac5169f51. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/BRTBV1100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x294f2b3ed56addeffb1ae5c8ba0417c5ba1e2ace0d2eb22135d80501587b1d98. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:47:20Z), 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/BRTBV1100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3228fe1012cf72f0bb9d06d2c90faee2e507af4c00f5cf0def24691e9a1f5d3b. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:10:10Z), 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/BRTBV1100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72c0490e39688d8e937d6c2e2e093986ea6829de8df9c3f897ba0d2ac5169f51. 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/BRTBV1100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc52fa83db49b11d94cc824d9764e4c54b91ec6f8f6cd5a303e276fc3ae11ea69. Chain 2 (Bitcoin): anchored in block 958682 (2026-07-19T06:17:12Z), 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/BRTBV1100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x186f8563d8899722d8df16d6cf261b2a914c98cd60e4e675c2eda45c9a64085e. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/BRTBV1100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x294f2b3ed56addeffb1ae5c8ba0417c5ba1e2ace0d2eb22135d80501587b1d98. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/BRTBV1100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3228fe1012cf72f0bb9d06d2c90faee2e507af4c00f5cf0def24691e9a1f5d3b. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:13:35Z), 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/BRTBV1100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9381ad302ab25fbb5fb402fe75678a2ad2bf4dc1f843aff246bb12fa6aa039a. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/BRA220709205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79444c9daa918a1546a7563f3782ed8f16fc4172d49ff99687861545008bad76. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:57:05Z), 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/BRTBV1100014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x508e20dd6f24475e07940e48f5faebe6fad16039936986354b74ff9b8df6096d. 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/BXBH22000025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x298440cf1d9f9a4486eef01b97dc6381979653ad2a64e2e3150353ae83085b2c. 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/BRTBV2000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x298440cf1d9f9a4486eef01b97dc6381979653ad2a64e2e3150353ae83085b2c. 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/BRTBV2000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a5b9d1d7c9a2d2725b5b12b6a7ae1e28474b91d84e7fb93a5f0fa556ca258ae. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:35:58Z), 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/BRTBV2000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x963c694acef9e0c7a32821bd26855ff3b26c04554acb8d233e9dc7746fa1174c. Chain 2 (Bitcoin): anchored in block 959026 (2026-07-21T18:19:24Z), 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/BRDIQ0800093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe355308736521aa401b129c77ac1578096f28c1c8040c1b1f1eac35d35f13e6. 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/BRTBV2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab304d8395fd6672110f9dc4032b6e4514e948e88e9224ae7c15d3d907574eef. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T23:32:34Z), 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/BRTBV2500002.