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 0xe36cc715d39eedc5617a91506b51f6a2cf699435fcb98a201ba26689ce96601a. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/69418f41-95ba-44a5-bc0d-d6adb504264e.json and https://artists.proofprofile.net/proofs/artist/69418f41-95ba-44a5-bc0d-d6adb504264e.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 0xc4ebf22e778452bbbfff4e2cb2c4a2435991eede4450d82d4e59b491e4229999. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/USANG2199636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x929cb34fe1a6c5cadcc33922c49b74c626e3ba4f2a6c9027dd0b37f4ed728d35. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/USANG2232676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1415e7ac03792f03fd6455b06b10e7bd499e88d2109e3a89fe72b0c61f46d13. 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/QZW9K2283079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2ac7ef3a5a5faa809a39b926eab4f99a5d065a2504d5ce32fb422df47ddb9b5. 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/QZNJY2377892.
Chamando No Grau Sem Deixar a Pistola Cair X Trenzinho Dos Traficantes
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4111105a15b42e7428dab465cfbe9ef9e62ddd546b79385efe8aca4afa8605d0. 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/BK1NP2400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72b8db02ce3555e9a3397566585c709f60b9e0bc796dd357c199dc993af2aa19. 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/QZNJW2419167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x079bb9b4ffbf053d1cfbd080dc914bde6b6204e983eb0e2a8e0ce4eb0ad07c09. 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/QZMZ92358866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd891ce644782fde4e28fe69c7d9af5b4b6f1c26608acb1f267b93630dbbdac6. 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/USANG2245477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3967ff308948e38c246826b84653fe52c48ebaa09ad0a5fc9e691deece31eeab. 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/BCHFD2200166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43d9225185fe815aa44a56aa74ecc715135ac0f6d51b2024271719baa61e74a3. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/BC8182200015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a89a80aef78f315ae7a95c5e10b8b86e9648928618659a96c0abc1b18185a0f. 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/BCHFD2200081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1848d85a1b25f7cdd5a3d840da0fdcf7ce10de7a12d078ade4078fbe2927acb. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/BC8182200013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9536ce0bc6a6c68229c84fa7baa93bfb08bd8280f82f2c7f4c1d2f461c5d1b0a. 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/USL4R2147126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04cd7ecb5aaf19819e757df65fef54c379b7b27090f5ba6fc33fc715a868758f. 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/QZNJW2141827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12eeb8098f921818f0625280ecd865325d57f22c28c8e1c839f5cbe496c864bb. 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/US3DF2298933.