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 0x8d36df8054e0b6f8db9d17f8811070f4915be3a10381b7a05b77b7285f349f09. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/923f45b0-a490-49ae-ba7c-8503e58f78a7.json and https://artists.proofprofile.net/proofs/artist/923f45b0-a490-49ae-ba7c-8503e58f78a7.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 0x890a703a9bcbec234af4b53382b18c6d12efd383682948fb5b05c860cd475f55. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/GBSMU5004326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92b33960a3a37e6f75f60acc31b7eb35e70b1ae77970764c0d08a35480fbbe58. 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/GBSMU5004333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6418634a6235a930675cef1e2d78d37b5f0fb960a38b05ab523f07f198c906d9. 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/MX2832027163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12d601e0526809d56fe9c8e3c13990b136d1142b0ed74ed402d3879df7cfc150. 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/MX2832027164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89855291e1dc2ad8d872c3da32569ee3461537c3d801b42f1a560d3dbcf58e0d. 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/MX2832027167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84e96302c93ae2432ea3b0bd040f0f11608667459b0016b4d0e9596daf9d44a6. 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/MX2832027169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae6082dcf2e72bc6e5c4db2ecede0469339212514c2d761378fa0f8c7591d14e. 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/MX2832027170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09fa1947bc853498abe865b0a28a8b9a5885cff5d3649f95e8b93d0e1632f1f6. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-21T17:17:53Z), 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/MX2832027172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b7f60532e19223b0992a950c0704902a7273638bbff992c7bc460995def7d7f. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:34:25Z), 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/MX2832027165.
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 0x8d28f85b74bb67dbb5844f8991bb962035501c94c4f6166be43e1fa5d2bfbaaa. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/MX2832027161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc262cc70451b9093fdc41d7b17c970aa4162605f481880c49bec9d74e5e69f44. Chain 2 (Bitcoin): anchored in block 960430 (2026-07-31T16:09:41Z), 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/MX2832027162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80f190b6ea4a8f21118c2779235d1d1978e17dbde879015c030795693ac2cea0. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/MX2832027166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e6594408953df755ea5095da62c3610e8d59ca580ef90b2504af296a837aa62. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:09:42Z), 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/MX2832250467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e92584bf0edde1367780a1f162ac2f8fda036c2561d66e8f556537ddf333887. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T07:07:48Z), 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/MX2832262378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6ad9702fd77b9dc2fd620e7f7a50ce5b1c6a0bc491816783606864619f6bc88. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:38:38Z), 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/TCAHH2313947.