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 0x6c1e3bc2269870d58f9a523a4f11446d1ccc28a6b251e10cb1ac9acd4954a6b9. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/072ad1b7-fe36-4dd7-8114-002c70e9792a.json and https://artists.proofprofile.net/proofs/artist/072ad1b7-fe36-4dd7-8114-002c70e9792a.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 0x8491984d2d983daf2300f8decc4bc12be64795e5a0bc8a7f94864ffaaf554577. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BXK1W2200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9ad518951c2050e281a313cbaaeebec91067dee5101b3bb37f362222cb59929. 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/BXK1W2200010.
BRASIL AO NATURAL - Vozes da Esperança 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaaa89581f41b6ae4806ee3388234423903ea95ecfe986c80dd825c8e0a1661e. 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/BC83N2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aa7f48d8d5f12186d4e22b54c76d3e34e8d1d5e4c880bef57fb652ae192f900. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/BC83N2100014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea7d28dd0dece9b6cc09fb0522b61fe9f11dda7b100cb905c56da3a342a04258. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/BC83N2100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e1f65bfbdd636638652b0521af3595545e39f737a344de7a44983ac5cf24d3e. 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/BC83N2100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fa865ac0bf4681d6233d4948599fbb55809d1c56bac44276db770a0d9f1d62c. 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/BXIAM1500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85bdc98dd55d95ae03e6acc0afc0c443c5e13abef655a561a9a1460ef4d113e5. 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/BXIAM1500005.
Coleções Porangareté, Vol.2: Feito Notícia Boa
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x584fa5480fa5b548752c6ff164dca22e00da44d018eddb3a30a49c9be528eed7. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/BXPNG2100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba2381a36a0c3cc62d011f9e4100b37b1e83e3d7a34a554ef871310e24bef739. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/BXIAM2300017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd63cebf18e1940778c2be26490120a47a8e0517c7768ca7e0178b8361b67e10. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/BXIAM2300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x329dd454aaea79167c6318b921e48bfcf4159bc495038963b9c8a35af3d46846. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/BXIAM2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3daab4c506b15ad939e3caf98347c99d5792bef51bf045e1d29c40a6476e6e1. Chain 2 (Bitcoin): anchored in block 960422 (2026-07-31T15:27:29Z), 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/BXIAM2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00d52e6878ed37a6737225b684a2b404666c6c4383ab1530da0a0e5d27be4025. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/BXIAM2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c323f2a672b9c917b1fe686045c1589a0ca86fbde496faff8a44994b79b21cb. 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/BCD172400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c1738fe51ff1b4ddd4b7c1dbf7cf9e0bd32543eaaa6ee476f79fa27d0a004bd. 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/BXK1W2200025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37f92d288ff1883ec7a4c468d06306145220f02d1eb1cf51bba9b308ecfbf445. 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/BXK1W2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42c7346e291319bda201a78f9c3fffaf89817d3f516624ef8d62d1d1338e1632. 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/BXK1W2200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd7fd1ff7b27696cd69b23b0db11c3c98ba38cf54db9d4ab87000cc1f65e9141. 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/BRNT10500001.