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 0x90d692ea01f63cbbb11def7c2f1061856ca47c5a723879add1fc286084895f01. 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/820aae1e-cf25-4af5-abd2-8f2cd9ef38b0.json and https://artists.proofprofile.net/proofs/artist/820aae1e-cf25-4af5-abd2-8f2cd9ef38b0.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 0xec2c92f5f781c3fd09df38387fa0c0dcc647874f58dda0c71e24fb14ef8c48d1. 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/BRCID8500038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc117090412329adcafead51d52ca2271e30a6e909c945e1426ad13a0d8aaa7b7. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/BRCID8500062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a9d831848dcaf5cf33634d81645ec05ebd5e5ff8941697ac53e86606ab70fe8. 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/BRBGC0600648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bfaec776bac4cd9d81926b5b8ad93ad377934c1539e2e5bc03a818535a1c6fe. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/BRBGC0701567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e2037e0f7f927ab9d8e9aa21ce4471c59ebe9450051970388ea4b625b3b64b8. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/BRBGC0701572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x110d3570ee9168f7815fecce9b05b59a5daf751e2434c88da4e710a7ba2d4cc9. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/BR19C1302850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eb220e9462c37644e58cf9101f8f14ca5952aff88e56120f6796cbdb654a0e2. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/BRCID8300074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fd8b9cdafd1e1c89aedc664706165bc63175ae035caf41d3f9afc58b6d07521. 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/BRCID8300073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3983fa532da0282ba2a38fcb57f57d601b89186b99550528f3846348b3f5943d. 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/BRCID8100052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eb7d9a98e0f26176c3239621f60c5a97aa20e723aafb49c976d614adc42555d. 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/BRCID8100008.
25 Sucessos: Choros e Chorinhos Cavaquinho de Ouro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89d82070d18561ad6a077ded88e4241f5471f49608c2bfd0b6baf342ea452cfb. 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/BRBGC0600180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11742f48d0b9417a5d616e65deafc935b72f448d1ede378df5f35b5f147ef907. 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/BRBGC0600179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eb9fbed71c0334560084217418ef6a0a967f36d3db4b8c5a7a3bd57d5727999. 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/BRBGC0600181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdacec66bd6876f3e862eac0242a8fd3c7d2e75d36e89a198c7e7dce5546930c3. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/BRBGC0601350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe1216e29412ee8d92c8cfad1fd4b7de40340d9a7bc4508fd6e0f175628911a1. 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/BRBGC0600189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ccb64de5c7c4402a3aeaa3871b9a0d337b8a040e8a6b71838be3c993be40f2a. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/BRBGC0601352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e09f9cf1a556eb8e4bea08b3902d3a974a26a404a85c813c1a83c65a81270d9. 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/BRCID8700002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4043307d6abf1a238afca2fdb5f78eef413ef644a891f1566376ff516b4618a1. 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/BRCID8300135.