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 0xa8451ab1acb069ef50f18042b6fdf74861e67e053e2e076c0a5db2a8b5f6e5ca. 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/cbc25ed0-3a4a-4fa0-9fb6-015ec66341f6.json and https://artists.proofprofile.net/proofs/artist/cbc25ed0-3a4a-4fa0-9fb6-015ec66341f6.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 0x72709787ccf3c057ae256a074a9e797656a136fa8bde7bcceaaf28cf1701f10d. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/BRTRB1990042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4564ed63e00e1ad5ecbfb4f8ca68aa4b6e299b2e903243774f391621f210e68a. 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/BRTRB1990044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe682bfb6027f4f18fc4175da56c1452c205bfe836672ac110756357a1cd630e0. 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/BRTRB1990045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa32da32bc00ad663a874abe6406326d860fd4b4b05e6f30362a1849facf474a2. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/BRTRB1990046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc41302cd00899f82660fdd12307edf5c22b89d4f6a8860076e84bee8f6ce14c0. Chain 2 (Bitcoin): anchored in block 958613 (2026-07-18T21:35:09Z), 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/BRTRB2085148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x531617f6c593a7a603620b2c37edd4a1e01d7b28ae0b879a70a4615809cb41dd. 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/BRTRB2085149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8a3ed4a697ab5a75193f942135fd5716566a694ff03091707ce63c4f57dbcdb. Chain 2 (Bitcoin): anchored in block 958911 (2026-07-20T16:46:31Z), 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/BRTRB2085150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa7bc50b82e8fc485fbeeedf64447436404dd0055b27c8a46fd68de3d8ba0ad8. 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/BRTRB2085152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d874a6504d23456dfcb05be6b519e8c4e57bd7b1058f393592126c79432f206. Chain 2 (Bitcoin): anchored in block 958911 (2026-07-20T16:46:31Z), 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/BRTRB2085153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bddc7c3cc42daf9f71c244d99764eeba0e688f3e7b5a34283ed1ee1075fca32. 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/BRV2L2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83c7bafc44cdf76e12bf6ad55bdbb2502a1fbfbc3e4ecaae8003e6f760cf1c50. 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/BRV2L2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc24baa5e7c50a248920fef89d6151d16afe6eeba4c549c12310ac6fcd9d1565a. 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/BRV2L2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85f066d6253b88273bd6ccab23cb5d434cb8dcc8393087a89d25195fa54e890a. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/BRV2L2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x300716cec18e52f92a244881494242795c1efd6e3b6343c619e08e964fca335b. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/BRV2L2400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cf51d07427cac73c54e7a876c0717100fa9e2dbda3b5cd315d60dd0be28dac2. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/BRV2L2400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdef5557287967161fa7f52004456ac58cc42dc114a83d2f6aa8c01cf5a0146e9. 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/BRV2L2400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d1fa3362f5da59433fe273f4fb1a9a0ad9bc693b8b6d72844232e19dbbfae78. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/BXW402200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10d1700666f7d4bccaf346b8e55c9d9732e0d9c9f02a16c6f6e515f04a25b551. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/BRGOA2000007.