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 0xb1d8a61b492f69a1b6794f5e379ffc35bf20643e27451343f39ac8161e63d457. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c146606a-10f3-4fa5-8e92-b1007f2972bf.json and https://artists.proofprofile.net/proofs/artist/c146606a-10f3-4fa5-8e92-b1007f2972bf.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 0xdb73228d6dd7de5632f7fa393f2eedd9eae5a08d7394a6bc7a7e4d37c1fc9744. 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/DES401400016.
Best of Bossa Lounge (International Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b9999ab7db2147f42f538b58d6fb49d53154835b7715d059a962e38160adb5c. 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/DES401400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa00c0353fa304f00cef3cdd78cdaa1b1a56c8bbe85eb3a3d77d67db5ce8dbaf7. 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/DES401400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb73228d6dd7de5632f7fa393f2eedd9eae5a08d7394a6bc7a7e4d37c1fc9744. 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/DES401400016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b0058f3c41edd1e4ba06c0ca27d8b57266992ba507823b49c0a162fba0f3562. 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/DES401400021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeef473afd966c8c1244491d127c01010d92d068f77cb7508fbcb8e81dbd8b3c9. 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/DES401400040.
Best of Bossa Lounge (Millenium Edition)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bd2da126e351b9076324ea17d4bcb0cf2db44089d9723eca3b4bb490d024462. 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/DES402100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc825283ef768074847460d04c69c99cb75c43fe021ce6c806fb8f3e57a329363. 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/DES402100015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x942b6b1d62e896fec51b6ec98fb15d090a7d7eda60230e832c9ab2276f67df59. 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/DES402100023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x422fe908bd495377a34ebcb843782d102d7515fb13eee72065506d514eaf4f0c. 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/DES402100032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b514deba0690f45048684124aca0f31af18b3544326ff365d2b83617776489e. 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/DES402100039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa00c0353fa304f00cef3cdd78cdaa1b1a56c8bbe85eb3a3d77d67db5ce8dbaf7. Chain 2 (Bitcoin): anchored in block 957065 (2026-07-07T16:43:21Z), 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/DES401400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b9999ab7db2147f42f538b58d6fb49d53154835b7715d059a962e38160adb5c. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/DES401400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeef473afd966c8c1244491d127c01010d92d068f77cb7508fbcb8e81dbd8b3c9. 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/DES401400040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b0058f3c41edd1e4ba06c0ca27d8b57266992ba507823b49c0a162fba0f3562. 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/DES401400021.