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 0x83f3451a36a985aa9729e972664ef89164d5ed0db7531187fbaefe21efff90fd. 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/90327158-79c5-43be-b27f-8e13bc1929a3.json and https://artists.proofprofile.net/proofs/artist/90327158-79c5-43be-b27f-8e13bc1929a3.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 0x9190c95edc9bec34476e64eb5d9978618257e2c09d99c5fa5e9b00927086f7b5. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/FRX201706196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x840f97c345c6f0537355ef07e66a9c2ebcd18c864506288fcd8324195056339d. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/FRX201706201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6a937039772af97aac3a38baa8fee233a2662887ab57ebf3e0076cc6ca2f465. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/FR96X1796776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x127fc1cc6fa5cdc35546680da9f163afd4ad4ba301359bd4bde71d1abe854c65. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/FRX201701925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54955016fd6c2a7bb4fb494d491e21442c7e6e30f5e33f570e92ed98284416f5. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/FR10S1803436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93d017086e4a00048540abdc5dbbbe78e7fc083f8df8f0f2ac29691b7b129b1e. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/FR10S1850380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa527af04cf35c0471433e5daec5c16b192e9a4c1ff03b1951140de0e00e72524. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:21:30Z), 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/FR10S1850381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79397cb013b26087f9599a51e8f88fd274fe888364b9140eb34b0bf9c62c1d2e. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/FR10S1850382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4afbae400db82ac1e2efee5797829976b6d3d1e89c25125df6e08c4afbcbeedb. 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/FR10S1850384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceb6f28bc3f2e477469b29a1d24f65fded3034e6911bf73fa76268c9b9455ccb. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/FR10S1850388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31923a07435cb28143763a11c3cc9b8bc68b961afe5153c4c48cecf20761cf1f. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/FR10S1850392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98a4deeec260e81041e35312e26e33ba653f88b87641c7812fef51e4b2481e53. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/FRX201754033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5d033dde3c1984b228cdc08c1df3873130b6c50f0200006633f26ade5b4f20c. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/FR10S1869355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd302da0f8feaf97f371f784b182c72261658e758ad8d80e344378918635b79db. 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/FR10S1878509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x141afd9fbb629bd9a9e43fda18bb85b6a7d53f00f03e163d469a89dc8037c2d1. 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/FR10S1878510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacae82a716d5e76ad0c5f3be5619803a5291b03807cf51974e6e9c0db7b2149c. 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/FR10S1878511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21eb276d75987e8f59ed340905fd9579820e9c2581cdf6283413de19eba7940f. 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/FR10S1878515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5515550d3d3bd798f0b4d13f570f5aae173d4b13c084d982acc02ef71d3829d7. 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/FR10S1878518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x035e9dfaceda07a335f149ecf0c321ad0f7e4e6f1399376fd7c6dec1826f3027. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T10:30:02Z), 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/FR10S1878474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87e4f670b7456982bbd3c43bfb76d87301d54373f103e105255894a10d9313dc. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QMBZ91989980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b46e4d4fca1567fcc4df3bfca72302f0f01fe48dfa97c080af265e20f14deaf. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/FRX281742437.