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 0xf2bf4df14778610305a7dc2c6b91b8f95e39e993b8b819c8efb197c183fa3c88. 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/8eb04a13-36da-400a-86c1-f204bbd45fb0.json and https://artists.proofprofile.net/proofs/artist/8eb04a13-36da-400a-86c1-f204bbd45fb0.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 0xd3fb16eb60807795455ecf3bfc0d083b564c167a4cfa48e8a961f9b9fda5afb8. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/BRVWD1800101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc082e1fceb84038a04ef4c9c3106378dc688e602f9e195f0fd00ddfb09ed933d. 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/BRBMG1801476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe023fa8995652eab431004d524aee15160ba28a13f193d1f053dd922cd722ded. 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/BRBMG6000015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefd67cbcc4736f3702b0054e9bf8f96eb84e86c454cea574e4168c2f60e8c5a3. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/BRBMG1802718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc4e255a3704961d110fcc0ac1529b3d11f67898c6bcf84815bfc4e3df3ea2c1. 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/BRBMG4700005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29b511394cc2cbbdeb82bde9a1f295a01c37abefe3a44fdbd33ecbc8c4ce90ad. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/BRBMG1801439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbede2d51047c699139ad177c90253d3c73d279ab7fe04d8988befa95d3e896c. Chain 2 (Bitcoin): anchored in block 958689 (2026-07-19T07:11:11Z), 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/BRBMG3900024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb6020c6120ec618a856e75984e23d626ccd550d42c9bec56b053107781ee4a0. 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/BRBMG5700069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36b2e4735a0b2d2c2fcf59ca4ad215a6e8fddfd403f54d7d2272c4db88ba1f72. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/BRBMG1801412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc14b6fe9428d902a5311df081f123faa2f21d9b88ce5598c4e2025b67c18a9f. 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/BRBMG1801414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc39c8d99606d70c3d0a7b1548225297999db7d0217b65a6e7e06213820221f0e. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/BRBMG1801418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x722a153eddfea56e0d58ba95a52f033d0bce44b7d8463d7c10a235d239d95f4f. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/BRBMG1801355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2031063e788fe8d528d7ad118ee1cc1deb91d7cb214495c0ebd72045b885a359. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/BRBMG4400025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x353d1a8cb49157fda85d497b149285df0de9544539b8e509e5e980c6127711f9. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/BRBMG5200025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e4537f259f853c32f84a951e1c9e09593be92d7a3738c065d6f1ec685c9997b. 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/BRTAC0600042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e03e512726476cf800434e5b3f3137af02afb47804527a185fbef8cf250e426. 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/BRTAC0600038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd58821067088231f7107f12de8abbb44121df8a196e938019868a17cd641a0ae. 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/BRTAC0600110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dc9bec2cb5248c2027512935d4552a1dd086c8457b62d75fe55e4f244152c6d. 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/BRTAC0600040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2196ecd50267e673ca0b759dcc91263893a223059832b6ea7623d2a463323f51. 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/BRTAC0600061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefb18a7767545984c6bef7057006018dd27088c59756681db6795919f9a1ebe2. 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/BRTAC0600104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf82af00c93625e44080e34ebec44fe9b3e009a4562020c5ade4e205be2a727d0. 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/BRTAC0600047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf100bcc2f17a18babd3efd17ddf7013fe7c04bd79b5b3f9b6256499f893a2ca6. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/BRTAC0600034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7881139dd872b86e27b3834d3dfe69093cb21530ea8552161d93c46cfb0ae526. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/BRTAC0600032.