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 0x465d6cd7a4f709a3ed902dd592416696f8252fb17ca15f5a26cde877eb24fa82. 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/fdac67b2-09b8-47a5-b240-503dd055acbd.json and https://artists.proofprofile.net/proofs/artist/fdac67b2-09b8-47a5-b240-503dd055acbd.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 0x8ea79b548eb6ec000e46df72f6f7e5784daa8e487630fe86e4cfb26432cb6118. 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/BXSVC1901746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99739e52eb0d48f2b81115a57b2732708cab5fcb776ec10ce7d1a5bc82608d74. 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/BXSVC1901748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6f89030a8fa98bfe5f3c93d36483691a7a06f20bb9c9aef4c287dce8aaeea2d. 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/BXSVC1901750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x728666e25a0acbfd93a5d72c6d73762a323b991d4b9bab2c657ccc963b00ae37. 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/BXSVC1901751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b9939a60ead5f09b542c5274c8c7db5595f13f2ae19e8848fbb64a2bdd6cf6f. 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/BXSVC1901752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82bd776fd0e91770bdf542c01cff0a5ee3a3be5f5f29ce85bce6d6172eca2acf. 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/BXSVC1901755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdc4286f41434397622cc259ad95ea7d7667eb4bdcd75549f0224d428be91362. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/BXSVC2400062.
Samba e Amor: Jorge Helder Toca Chico Buarque
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x279a9e93844453621bb6fffa7e9a9908f939102ad282eb2a48776874f473664a. 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/BXSVC2400061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdc4286f41434397622cc259ad95ea7d7667eb4bdcd75549f0224d428be91362. 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/BXSVC2400062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b55984ea177fd1041c5fe28cb7fe199df8b317d1f5ffafaa7d72a87e201e480. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/BXSVC2400063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d1dda1ab30fbe186f4f1b8aa37328d0c6c470b0f47d5b80498a5b7ff16e4c81. 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/BXSVC2400064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x998582667517781526a2b540864df3219e46140c6f4d100d7a1cf4b358a2e0f7. 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/BXSVC2400065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cb36260ad64f1e9fe3fe5e0d4ca8c7642346207a86000da01c131d196683789. 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/BXSVC2400066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x050708c29f6c34912902993fb59636501575fafae3ae64df1c73dae25c5fc317. 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/BXSVC2400067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16e61af8e57a2c4abadd78e018bc09f1d9e515bf86beb7abba4009b15c708df5. 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/BXSVC2400068.