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 0xfbc8d9fa3aef81fe0d854157276e40aabb1e995ad0d35fd23ccf8c83654b3389. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7526788e-def1-4744-b89b-bfc0fe1334e4.json and https://artists.proofprofile.net/proofs/artist/7526788e-def1-4744-b89b-bfc0fe1334e4.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 0x5cfefaba30387da6a0cfdf2459c7fe2495fa25b4511d46ee02f9d06cdc462f66. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/BCDAP2300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x405f8f9d29b487661f8cee010a0dc727b358c207535f032da51bb987c6622d7f. 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/BCDAP2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14d67d402cbac1bf22422643c1afc12971911793eb668b86c6fa1af1112defcd. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/BCDAP2300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aa0600b9e49860c3c0e22a388a1d2283b01bb5cf94394f0c1cf8cea6833d5d9. 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/BCDAP2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7744a0d516df6a26d2e36e12345dc72a1f0289c2d49217556d76632fcff66597. 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/BCDAP2300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0764eb78b646be190b1d402d905b14b6cf798f1a23b120e227d01effcd017eb. 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/BCDAP2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe12b26d8ba55dc5cc4cf785e6fb56f813b86a8770e2bcab051a478d020a2be50. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/BCDAP2300005.
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 0xd1b067d9d62c1acc7abb0a57f13cf18248ffbb03ac38d2c0402e115e0601cdbc. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BX7N31900010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02d03308cae229c37d85912bc7caf873b3ce7fb7c1168fe255aacae9cc7d8402. 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/BX7N31900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x286356698edea19ac1eaa9dfcba0dd9122535ddca430bbd37568657edcf439fe. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/BX7N31900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2875845f61d14f05f6a8a1fc3f70431866dadd7b3581881f79023bb4b126b942. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/BX7N31900009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fffa5c6ea43ef532b7a7a3921938cd0e88d01b8d9fa8c287af17cc597c59162. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/BX7N31900012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d84f30bcad78babe1f69b0b25b527955cc0834dd7a81b4e39cd61dc5057652b. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/BX7N31900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x389c4c094f71a08baf195464f559ee46634bea9dcb50b8a25789bf8294ea36ce. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/BX7N31900008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ffac1aa82c890e415aaacdd65df2bce2a38ddbfa346469180fdf32e4f2b4c24. 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/BX7N32400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b519c2666d0114729900bb750a265085ecc77c13656d230fbd812e7a7ae27a6. 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/BX7N32000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x054d2e677baffe28ea799e41f0b5b3c9f1456ea807dd067fb0c3a0c711366838. 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/BX7N32000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x102d87b94313e075db92e1364e68229aa2d336983a87ad7eee924cedde5aa5ff. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/BRNOJ2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf13ab3c3a267445ac9bb5fea95eb071ad817547edbfffea75ab945f4f55cd308. 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/BRTCD2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b539df83f100ea6db3cecfcc91efee9b5a79eb0544d97ffc5fce7e171df2d12. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/BX7N32200003.