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 0x75122f6cbdadd3bdd169c13b0c80d2c71ef0183692bfdccd3783ebe1f3be4b3b. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4ba4e062-62dc-4391-99d3-f24c8e5538da.json and https://artists.proofprofile.net/proofs/artist/4ba4e062-62dc-4391-99d3-f24c8e5538da.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 0x8b35af8658d96002e0d630689c2d4a596905dc983ba1c3e39f78ca99ff5bfeb5. 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/BRZDS0400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd29be3c3880f357eaea10201a64fb39544a2510ab809b40e1db7ec90992665f1. 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/BRZDS0400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bcdea07f613ec930de007ba959741d217dfef9e2c292e7f087625f717c10e7e. 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/BRZDS0400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96f51d3e0d1046e7f5cf8c913f8e1b3a90536dc9a77e749e7a8a1708d490d8f4. 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/BRZDS0400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65ef53d955a7ca1646371bee3c3420d39860ee75474863c0f8d927625bf2966c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BRZDS0400018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x221e380d103dd7a4c8db4692e708e83d29d41838a42931fa7ff54d378e3ee40c. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/BRZDS0400001.
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 0x20fc3e94d55762cca5b196dd3781d48f8b7c81d6117a64aa1d9794a6197db4c3. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/BRZDS0400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa56b8102f79ab119c6385244380ea62b15b8629eead1e389ffedfe7e0e028684. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/BRZDS0400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50cdc495b74074b2241fc823f6083f2e964c94a857ba8bc0c86436d78d613d82. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/BRZDS0400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f37c8fa429e6639599ed27114cb9e1a374f5f6218d293df9350982a59759625. Chain 2 (Bitcoin): anchored in block 960173 (2026-07-30T00:11:40Z), 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/BRZDS0400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84e6728d0ec6d1fc876ba53118a59f78fcab90f18e0d2073e035d757af30acc5. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/BRZDS0400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bea38cade9c2f96752a0ae17e43e02f20bfd52c988e97dce2c4bd1ee2ea0d7e. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/BRZDS0400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4179a6893a7e98e6a2054e42ffef2117e533013544fbe70590bf04c1b0d0edb. 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/BRZDS0400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65130d8afd38d01ce036239dc4b28a28a4d5f4e03a3492c98dd8bc26d0d2cc46. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/BRZDS0400017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc094328b7b1efccf8020a22d4bf0839384729100b2d3ee4b8191aa25f8a84ac4. 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/BREQP2100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf87c73ff79c4eb8462afdb87628d7cba12ec6cccc670b4afa78393db10db19a6. 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/BX2O51800017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91e4b783f20f2c7e3dc9af7ac94b9d41e7fe387f2e973d91c75fa4b212b54337. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/BRZDS2100012.