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 0x4d2aad91234b515b14f519faa206a7e9c47ef03252ac2c1ce49c01f469f39ef5. 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/8b509bdd-47c7-4880-9a88-fa4897e63b6f.json and https://artists.proofprofile.net/proofs/artist/8b509bdd-47c7-4880-9a88-fa4897e63b6f.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 0xd71691187ef3d62bb327da036da264155446cd283c5573f84b52a6db9baf4a61. 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/BX0GC2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cdb509735b45ba807069ca0a6105a6041cefa1e7f0a380b039a7c9477e11d7b. 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/BX6BS2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9611b7949ed97bce04697f733a415df6090ddeff3bd1bf7f4eba1cef313abced. 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/BX6BS2100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8585b4991388f79c23811f874668ae11d98bcaf9a460986ce1d168402fbc232f. 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/BX6BS2100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf461dfd111afe69a8a1a6de06941a422c9f4949f65ebfd3bc03d5ee27d59666a. 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/BX6BS2100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba4458e9d163ef16c1d2cd5f52468f6b320aa654f983ef9f3f7f63301c34643a. 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/BX6BS2100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb33a6df9f1e856917fbba9668e6e0f73f7839f957ba0f8a385627c58e59810a6. 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/BX6BS2100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33887f5fb5e5a53986924527c7df3b0739c8a6498b20f5f2119337a36b202ce5. 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/BX6BS2100008.
Aqui em Casa (Ao vivo na Casa de Francisca)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb10e78bff1d4e2389aca3b77a952b1edd924e55229cd5428aa0b5a10d7848cb7. 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/BX6BS2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1ed6914f4693017cf2b9d8f1957be1e0da05640405e22139a8c431915732f43. 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/BX6BS2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c8348c10a65c0dc6de2c5ac5c711706d2fc0d09daeee4bee41713cba49e1538. 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/BX6BS2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc63d6a3a673046736d25d05d4c1f527335107e353f302c71d9b70bd61fe8564f. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/BX6BS2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc29eaffff5ace65ef2f7be5a8963aaf9292b91871fe81b1be130579031d8d32e. 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/BX6BS2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33887f5fb5e5a53986924527c7df3b0739c8a6498b20f5f2119337a36b202ce5. 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/BX6BS2100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb33a6df9f1e856917fbba9668e6e0f73f7839f957ba0f8a385627c58e59810a6. 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/BX6BS2100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba4458e9d163ef16c1d2cd5f52468f6b320aa654f983ef9f3f7f63301c34643a. Chain 2 (Bitcoin): anchored in block 957067 (2026-07-07T16:54:37Z), 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/BX6BS2100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8585b4991388f79c23811f874668ae11d98bcaf9a460986ce1d168402fbc232f. 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/BX6BS2100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf461dfd111afe69a8a1a6de06941a422c9f4949f65ebfd3bc03d5ee27d59666a. 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/BX6BS2100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9611b7949ed97bce04697f733a415df6090ddeff3bd1bf7f4eba1cef313abced. 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/BX6BS2100002.