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 0x1b9b82aa0ee9f0b3c90ac719f225213be192a17841f0dca21ddaf65da1db3ebe. 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/14ec29a4-f8bd-403a-8d41-b0f5a436fbc9.json and https://artists.proofprofile.net/proofs/artist/14ec29a4-f8bd-403a-8d41-b0f5a436fbc9.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 0x278cf13c50aa19c833155117a904f256aebd8a5edc7df51c79acf7d9cee65565. 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/QZNJW2424776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ef1ed4290caf7d448b30fafa16571c5d32f61deaea26d9af27bacf0a73b13d8. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZNJW2408796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8b0fb552c8e22a0abb62c0aa9f9a938a155a422801d7819e44e2e244d5c5d52. 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/QZNJV2410660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96e2b8f6e853350eaf196d9053ec631f1dea7c442a21ee6a068cea963df92216. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/QZGLS2420983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aa9a27d39a560ec9b3fe4c0a56d73e73c1f3fb0ef6ccb838175d5f5dd19fd12. 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/QZTPX2387465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6a203bd50f4416196db9eae2020785afff59a3e7c3d7c1bec4aa45ef8837c19. 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/QZTPX2387466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa08e2b37577e6ea81b9e60b58f52b2203ac910294658a0195f411694538bc0f7. 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/QZTPX2387467.
herança (ou ''a importância que nós damos pras coisas talvez não deve ser tão grande assim'')
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa9fade9f4c2f14319e8fbfccc7234fa55cb69a75fa07dd4a460af68be832e7c. 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/QT3EX2454531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe28e9b8521d64e98d9df4f77284c5d203296345bc14a7f0800a343b3a20bf66. 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/QT3EX2454532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x016cfc776d30f1ec0f1958bea2451dcaf62d06535d27b0f0c23dfc64bcaf0a4a. 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/QT3EX2454533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb39e5944d1128216dcea61556c901b5cfc8a63abc44d46c0560ff1b7f2230636. 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/QT3EX2454534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95e8d4355b4529b6cde8e2cf456f85a42c3017aae2c0612c206a945c80b0a896. 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/QZZ7K2460305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9e8a8405204955692ce57361e9326e4a0e4e49a2317e5576a011601e32660a5. 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/QZWFW2422428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12e1d2fe2a9628bf4a09f347e613c62d52dd3b090f45e9d7a1b0f44403f76ec7. 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/QZWFF2454274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eadd1b6156776aa03d2ac269bb12ba97b3f461ae4505bc45bfd5a6150d60c6c. 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/QZTB52455611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fe9e8c7a26ecafd4e4b292c69fd399126e163105998cd75717fdc4d818102b5. 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/QZTB52455612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d52a8e170835f5fc3d9eb495d72e9117df3665ae8e57713ac74394d6ee4dfe8. 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/QZTB52455613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac0e8fded115961b9c5d33ede1a0a9fc812de6aef2673fbb60ba1083993ee9ad. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZTB52455614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68ef2f78f5d7793f413ef59c827391c0bc34e739b72a48ec720f09185974263a. 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/QZTB52455615.