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 0xdcc7c63ab260a5c4e064120e2fc823f39add7e69593b977f4f783e379ac56e12. 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/dffd04b4-64a6-49d4-bf30-d8c8ebfd77b9.json and https://artists.proofprofile.net/proofs/artist/dffd04b4-64a6-49d4-bf30-d8c8ebfd77b9.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 0x7a9ffa1ce77cc601a9dd84abbd2ace906d4e1020b6114eaac869000f253741ac. 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/QZTRX2307293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd1bd48ece5132746b0e2a1042dfb6ed793c6645638d9b3a6438d5cecc6cd924. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/QZTRX2307298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x392931c0397baf1be21b869603f28b04cc8933b51b03d44362aff8316f0dc889. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/DES401400029.
Best of Bossa Lounge (International Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddb5b123992fe14170c8faf5eab62d2e4ba9720fd7a65502f40dd30609195e45. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DES401400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf06697b83de0d43f444f4e9c87db9dab98f2743cdaaca4b9dcfd42697a40157e. 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/DES401400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xced9ee4d2ca015603c183ca22d3aab7993ead6460412088a08bb9cba3ecaf8ac. 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/DES401400019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa57be95ff5f86045c4ad5d3080a4887f90f1fe36a009546770ac82491b6bcbbc. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DES401400024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd385f72f605f997986c1f5f58f3c2a9fa15421e185a726227a8bad8c7543fbbf. 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/DES401400027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x392931c0397baf1be21b869603f28b04cc8933b51b03d44362aff8316f0dc889. 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/DES401400029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9683d476a14b73b0825641cdcb54ca5fe41d33c7663b0bc4cf4faf175ae520d9. 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/DES401400035.
Best of Bossa Lounge (Millenium Edition)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8d8f6991c60a27b5838ac164ee39fe24270feea1ff18795777f5d684dcee22f. 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/DES402100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11163118b5f271e4be215c77b2bd4306b59cb90157ec88d407a861fcd238f274. 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/DES402100012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x107c968dea4415e411ee4a21c349c563d1579ee24acc5bfa62056feaf7054a42. 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/DES402100021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ffa45f28a5326693716ae60350c1429dcf83577627fe05852f2614c47332984. 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/DES402100030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a3e4ff04c88aa32015b8ff4a8c99dfb76cd2615465daa4b8ef066efefe7352f. 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/DES402100038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddb5b123992fe14170c8faf5eab62d2e4ba9720fd7a65502f40dd30609195e45. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DES401400004.