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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc50eefda96405bf95fa3b76f3a9467307b7ab7a7f67c97522f967de698136e5d. 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/39e9b5f4-3c9c-4125-b723-0c7bc96bc027.json and https://artists.proofprofile.net/proofs/artist/39e9b5f4-3c9c-4125-b723-0c7bc96bc027.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7930349a44584d3958f34c39d078646ded29c6b08513dc232bb6284a36c16a7. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZZEB2303012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd78cdbf8cbb1d37687e1e4340046b45d68bb03cb5467ed11c1b9415034ef333c. 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/QZZEB2303138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7d1b4e210b520f738f2af40d87225b0779f575c724bfe08bbf55e463da80b3e. 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/QZZEB2303140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb8d5fb94a94381e863cd2a7189c0035e3ec74a7f66e29ea6b36d121e5052a7a. 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/QZZEB2303176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba51ba3ebd869fc60e9bb79d9e22fca0015807deea7d1e6dd39e945ac5c093c7. 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/QZZEB2303248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3521e2f784cf3b326f9a3c05f5ed189d80592da6ecbe95fee4ebe7d19fbbcdf. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/QZZEB2303270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x787d5af4719fc5bea0e28f0fe572f0400704f0af591df822d362803cacfc0643. 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/QZZEB2303277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0e3998c1077647218fb6ada3ab0dd67e0cfe78df29b49995bcce6c8c491f148. Chain 2 (Bitcoin): anchored in block 956995 (2026-07-07T04:27:57Z), 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/QZZEB2303280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2c5730443c05c250da8ae90211b98610002d50a6cea53b2346c0474bd03e103. Chain 2 (Bitcoin): anchored in block 957011 (2026-07-07T08:25:35Z), 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/QZZEB2303286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73b4ec5c9e5da2d4399e81d6e7f8a43e04dfe3adb1e9af50653ef7b87eca16c6. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZZEB2303289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fd3ad2b99e4edf618145b14392ad78a5cb6566bf1fc2ec8d4ff72dadbd7c540. 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/QZZEB2303292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3cd75787b3129489f95ba8f5442f824bfae28ebc17297b14ccc7a6f33d07e0f. 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/QZZEB2303302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80b434d413d67620634e0c9a944c5cb2ef503cd63167c3aacc49524d952c52a7. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BC3PG2206173.
Acústico Altamira #32 - Uma Tarde de Agosto
Acústico altamira #32 - Uma Tarde de Agosto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda6cd28e7a997d2bd03ad3dc197e647e7cda33f088f77dc6dde3455bc7f08bcc. 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/BR9Z22400132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7044d2fd80d75342ce337bb93653444ad3f4676c00400c3ef8c6653b138c72e3. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BR9Z22400088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74d0aca2ec2c46d89bf96cdb28967611986f806890b525f770958f9a89a63a4f. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/BR9Z22400077.