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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7686c3ba68892078c1349d40bfd3e30d9cbf8b9c7097020f1f70945904360d4. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2081c497-0c2f-4233-8a67-3b0c2dc22164.json and https://artists.proofprofile.net/proofs/artist/2081c497-0c2f-4233-8a67-3b0c2dc22164.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dd91c2f599d1144daa160b2c1163e09eb94287ad3f4b40ec07f1a3823f8eae6. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/NLZ541500145.
Stop Talking (Daddy's Groove Radio Edit)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65bbda324e6145df12668e5ef637c8564fc04699c79793677d92593d5990a82a. 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/NLR4G1700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd962837c43f60de23c7081f21c4793f476b9972eb2febe9888255abe5984e26c. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DEY472084073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92e172227b0d226a5fe45ffd8a1ef83fef284734d1ab792f5b23f8269127ac6a. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/NLR4G2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd405c6059f7391e150b8751c25ebae3d9044041c7cd8aa4a5207ac175ddca935. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/NLR4G2200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5aa017bcd6e96a5eed65cf4a337b56497514aac5dee2b5cf74c1b0b26d74e72. 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/NLR4G2200012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd670120e7379770ff1671a3cf09125b8d012a73381d1f927b8cba9441281c439. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/NLR4G2200017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76a4fcbbd5f86e701ba299b972eedb21979e454384813a55a753e780a94c70a9. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/NLMT42401493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0608ffaeba25061c4f6e4d724a06a8a31634b321b22ad7dbbacb940de715ad20. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/GBKQU2553693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cab56107d6021cb528a81bfd597cb8ab16efc80a6152dcf8716af4ff5ab7780. 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/NLFJ51000061.
Immortal - Leroy Styles Remix Extended Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc5100877b4c6930c98fedbc3ddb95baf4917d53611a21d091a6e666a0ff2f3f. 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/NLG3N1600033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x592eb0e5fd68e9507ab812dfd9b9d279a79141e2f3bbc18326108028976470a1. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/DEUM72411542.