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 0xff6a1f98ad527bf907763f53e8b9392ea3bfc6b603b07a263edc90fde79e7d21. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fbc08264-607a-4cdf-bd73-9f7c0f005ea2.json and https://artists.proofprofile.net/proofs/artist/fbc08264-607a-4cdf-bd73-9f7c0f005ea2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Aldir Blanc & Maurício Tapajós - Volume 01
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 0x452786488eb937175a43a22ef631ce1b7690f313610d534f24dcfb483f638113. 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/BC0UO2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x806dac404b90efe903aaf7eb2481393e71e37def17f82372f6ca35bfbfadd69f. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/BC0UO2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1a56aced6a899a9408613136051bb2cc6492e01b9d45e611504741460977945. 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/BC0UO2200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf730ed13443cb6fdd8d3842eef7e6db105029c42d682667bfb5fb67502da239e. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/BC0UO2200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6187328cb19f5fb1580c6137f7c6accaa52589eb2b9f3c269195272f01bfdb80. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/BC0UO2200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x999403d1428a669eb5545db1c3d67de097c3f41eefa9258ae0509d3c32c8da41. 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/BC0UO2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90e27b66836b1be0522c222b6116a0f0451908709d4485e9255b059274b5f014. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/BC0UO2200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9b9c0bc4d69b090113d8034f1d015205cca4c3babca4cf7392a13561d42ff31. 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/BC0UO2200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc55475c0a846f9f291b582656b09478ae16e34f136e321a8dea63d97ffdc049. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/BC0UO2200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cc5d0500a652f7aedcf29534018520dbf64fd4ec01d929921b3d42541c745d1. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/BC0UO2200010.
Aldir Blanc & Maurício Tapajós - Volume 02
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cf750b655e1967bf8f58a333fc2b92a8490b180eab79bb296e32c28d26b96b3. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/BC0UO2200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x120ec53b2b4f36dfea0c3d4555a98a8143c13042b2d8bb98917ceecafcdf422c. 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/BC0UO2200012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95b4daa526df7726e6c05e094a4afb1f88d46611013c578d2dca2aae2e054cb5. 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/BC0UO2200013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a5a03438a8eb17f43c59a582952b5a82a5007d86abe04a8fa03ea713a73ea9f. Chain 2 (Bitcoin): anchored in block 960166 (2026-07-29T23:39:29Z), 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/BC0UO2200014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd784acc721474f02fcedd1bd5acf7b57072cf6883af36a384e82fb11a1ce45ee. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/BC0UO2200015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc25c099b94c4bb425d7d68fd738e0d302ffb5030ca5c724cc6f04172b1132860. 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/BC0UO2200016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8d2fc8118408f05acbfbb2e549300ac0e67e9c8f1e4048fa402f6fa3d436bba. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/BC0UO2200017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaedc05f5b88a971e0dee9d9198b6051767681408c0c963436debbd03e91fc335. 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/BC0UO2200018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x466c1684b96c8e2a37f004df06ef0ed18c5d2652672c4f61191b8af1a893a7cf. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/BC0UO2200019.