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 0x2e8ff8ea3fe3ca438e9f27500e084c0fa7f0fe33d21e69da152cc2061578438c. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2580ce57-5017-438a-b99a-6f41c04135f9.json and https://artists.proofprofile.net/proofs/artist/2580ce57-5017-438a-b99a-6f41c04135f9.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 0xc768973ef51cb5d1cf51b89c7cac41607a1211328243884ee26c068ed7fd3580. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/ARQYU1900799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1cbede4574e05b0722caad51b2f47ac4585b1febf5e974dac57a15ebed73559. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/ARQYU1900800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21da841e129ca4a4be26ebda65d4911be3278eee58ef67e8fb05007be5f55a00. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/ARQYU1900801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8021c0a9e73cd6c119811f601c68f006c4366c13b1f7fd81c40e2dcc190c2d05. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/ARQYU1900802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a1de894931198aa2f731894c71ecca8404e6a1992d1f1f48506731d312edbf3. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/ARQYU1900803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x685aafea67f95e9cb745d992fef02bca5df3dfdb288b397bdd972bc117deecdf. Chain 2 (Bitcoin): anchored in block 958691 (2026-07-19T07:19:31Z), 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/ARQYU1900804.
El 772 / El Petiso Maceta / Tierra de la Yerba
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed5f2c15efcb1dc3e71fc994a65c8fbcf26c91c77060b7e9fd15c8c282696539. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/ARQYU1900807.
Polka Paraguaya / El Colorado / El Liberal
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda73de7c7c03d106a72f7b32de85370d665b9708b55f568828c082ba67267077. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ARQYU1900809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3d2c7788c3bc180ab6be2551c2867ca4fa387fad52269277525860167ccf555. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/ARQYU1600623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1ce2f0d414cf0d417d815f52e4f17154355894d42b70c72437858552886b492. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/ARQYU1600624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90a62fa82e9721a98070b928768f0920669bfe4119b50c54629ccae99f81a505. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/ARQYU1600625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d349ccf6aabd27d6f5d6e3c86f2aeb2ed530276d54514510896c0cbe40bcdef. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/ARQYU1600626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8987a0fd62eca610c00c1a1761eeea860aad9af0b27e57f1f7b099a5bbd4cefd. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/ARQYU1600627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6494dda0e3841633bcad0f7b53bcf65e193ae930040499f3f31167b209cd6dc3. Chain 2 (Bitcoin): anchored in block 957603 (2026-07-11T20:26:17Z), 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/ARQYU1600628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x208e196052ea86246a534a7958bd9061138829672b5d3769e2e1e03485107048. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:49:28Z), 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/ARQYU1600631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbda930280d901135aab77036686af81e8a3de75e1c3c4526732fc603f2116366. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/ARQYU1600632.