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 0xf3f07f29466ee4def5e83d45252febf690010f17a7b43a022f4c11a62b5f8dd9. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e57f1307-efcf-4797-9ab2-fc3e812ec317.json and https://artists.proofprofile.net/proofs/artist/e57f1307-efcf-4797-9ab2-fc3e812ec317.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 0x4c20473b34af48534f5d63b15c1ad5239f3ebfe16926410ecd23fab4a885ac05. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/NLVA41200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9724b410fa36716bed4c6a967541a0e34795a827b4ecc4901e233c6b33629b2. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T21:50:40Z), 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/NLVA41400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadd5c86aeab430f6aa14953a0d14044326acaf37b636f2bb0e53efb1d935c9ec. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/NLVA41400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67066d9f5be632c4258c7ae0a8d71a8ff53a1228a87d15972b2bd5ac7eb57335. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/NLVA41400011.
Brabant (Paris) - From The Voice Of Holland 7
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ff2abbf7ce7ecd484d6dd1e10333fee13f9770a5f3725c6f3b132b6b95ee9d9. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/NLZ291700022.
Brabant (Paris) [From The Voice Of Holland 7]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0692e43ea822283e956af8e3559cc2d16b2eaedbb83c38db789dcf774cdaf8d9. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/NLVA41800001.
Als de liefde niet bestond (Si l'amour n'existait pas)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf000a92a1e742d5aa88715557f86328334c990a7c7afa526e9d0a47c2d04757d. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:28:48Z), 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/NLVA41800006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc80bc7735a3f879263ae9476751ae23a23d5a518d79c92728fffb458b9462ff4. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/NLVA42000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8a71aca7efc9b9ee4932d7980a353987edf4a93926252948d375a0314f5df32. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/NLVA42300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d1a6c9439255f3b1b38d4ac49b08b8f5922a35fb99fbad24d007aba492c1a1f. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T19:03:44Z), 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/NLVA42400002.