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 0x5c94e625dd3e08cefe378b5a8d9386165926674c3932a3345ca9825b9e464d89. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/27f54688-0e87-49e0-80b1-6e5d06981c8b.json and https://artists.proofprofile.net/proofs/artist/27f54688-0e87-49e0-80b1-6e5d06981c8b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Just Did It (Alcopop! Records Sampler '23)
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 0xded5d4b49afe6ab221e7b1c55a01153d9055f97e3f49070fd2cbffeedd3deab1. 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/GBLFP1895293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4802c6efcbd24cd3ae6e4b21ba0a1a0ca8252c0b80ce4702aaee1ecc891a906. 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/GBLFP1895263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fc2804f61ca9ecc15e9e6ce4a22f2942e4fecd640f623154be6923377b45271. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/GBLFP1895307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59f784571650878b4947abac35492061243574c54c80a9d8710134726ce74a9b. 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/GBLFP1895324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f621ca3635d953df5ef50e1d231202942dd6a7eff26699d2baa4b204862ba74. 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/GBLFP1895367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce22cc803dd9fda890dcec01f6adaddd3ac9c1f7a41f17d6f08bd960711c35ee. 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/GBLFP1895407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x806fbdb161af2c5616ba3a8aadb92bb97d6b3cca914fc7612d30132491b25e87. 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/GBLFP1895617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x932f76530eed274174aeb68fb2143db656ec18eb1098833d72c03a1437fdb7c3. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T15:03:04Z), 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/GBLFP1895593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52fca8037e2611b1f590573c406c3bffdd91833d0f59ed60bb388147aa497cab. 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/GBLFP1701564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf6c125cccde2e3d516a8255dbf548edb599dbd065719325807e9b721496128e. 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/GBLFP1701610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d782abab8d0a2fe7ba527386baeb856bc7f93d9f03adfcfc0ce9a0f1bb73e36. 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/GBLFP1701568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa77edecdda5e4d5f578b2b0e92afbd6c70f9d6b0dc39bba25230b3bfd8144e03. 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/GBLFP1701571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80bfb5f9ec776df5d311e9fbed4b6d70ca9915b61d8806359518b2ea1481ea89. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:27:17Z), 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/GBLFP1701565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f666898d6f0d776b33add99c542b30f82d942ad1cfa933a92e625d612c303a8. 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/GBZ522327604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaa5f43b56f0da9e9542db812bc838fea73b42cfcf869ec00688e76baa864eac. 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/GBZ522327603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb50db428d9ec9ac349b762e266c0083e20fc6e9f2e6c345f116943affd99f7ac. 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/GBZ522327601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaa5f43b56f0da9e9542db812bc838fea73b42cfcf869ec00688e76baa864eac. 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/GBZ522327603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb50db428d9ec9ac349b762e266c0083e20fc6e9f2e6c345f116943affd99f7ac. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBZ522327601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb50db428d9ec9ac349b762e266c0083e20fc6e9f2e6c345f116943affd99f7ac. 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/GBZ522327601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb50db428d9ec9ac349b762e266c0083e20fc6e9f2e6c345f116943affd99f7ac. 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/GBZ522327601.
Pop! Look! Listen! (Alcopop! Records Sampler 2024)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6b4b063da1a173e87be05041c2dda6d8494fa7c51fab7287264c2f9a85816dd. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/US2421330706.