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 0xffde6dad4660515d993e9293861db1e737d9d4291b8fc3a0a92375ea4b266ec2. 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/13650135-b810-4542-9b93-6aa9bd5e4392.json and https://artists.proofprofile.net/proofs/artist/13650135-b810-4542-9b93-6aa9bd5e4392.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 0x10a1bce0eca941d0948ef6abc5a9340def3cbeefb6404bfdb15dd5841c311c66. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T13:44:55Z), 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/US7VG2338469.
Songs for Girls 1 (The Valentines Day Mixtape)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa270cf146457bcb3ce735aa713e30d46b0966b67813a74de476a55f96273cf25. 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/QM6N21435654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72140010b161e941d301b52a0f53799bf122376fc6b22153892ae763c629e53d. Chain 2 (Bitcoin): anchored in block 959034 (2026-07-21T16:34:25Z), 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/TCACH1522256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbea7e68e6bfde43dbb3aa9690e4271fec75fd817d9fd501736fcd426e302ac08. 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/TCACH1522372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbe2bb1c7d371933c34ce0f4b25563140f69f2a30f54d4d34f6aa55e73c5ff13. 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/ESA011627113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd911d28eecfd6e2a3b900f3c260fc4776cd04b36c7766b43c381123d3cada6c3. 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/ESA011627117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x683abf9f925580138cd4fec589948e7ab1d1378c30c15ffe88bfce51f93df701. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/QM4DW1776620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x778bd3dc42cb0d94f059327986276413cd1f5df4aa91d81be652488220f4b17c. 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/QMPKX1752826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6599302fe4a9d043eb75ca4ec3d62e095fc612cdfca23c5e25e8613ad7f150b. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/QMPKX1758409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70c467a7af0c4c2a8364c3f3c729fc5947484270ead5085c5250271ef22a4bf6. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T03:01:27Z), 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/QM2PV1705213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9181b7536cbeb5f464e1d7ed4e6a11ff0b88e86b846363c8a832a964e9940e2f. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QM2PV1705225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd606af6e1bdbb909ef46d44b44a2823154f1347b7f77e60bdf71248b11a0d1a7. 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/TCADM1896301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e4d9e4b84c6acf8edfc815384875c6c2ca0c6f914a5b1393c8e85f32df74e75. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCADP1896035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e8dabf8be5783f92ad61fb5aebff2a297024c7bf1062c1392f3461a539b3f29. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/TCADQ1803384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc51cfe7c3662a11f69d4eb31dc65f873e0d2ee71e5a5f1b5b46567fb2564e5c0. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:58:30Z), 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/TCAEC1979667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f6c351e543d461d7cd4744ab71bf9eaa0047ecdb594e2648af2c3c9ce81ad7b. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZGLM2371897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9edb588127792629b4de95e4bfb9992c6fbc84faf76ceffcbbbedeb22f01c406. 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/AUMEV2495529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a5399001a2aa346b540a327a3b8716671061c3146d0b48212b0db031ad35a85. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/AUMEV2495489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9a28da9a4a2b6f10c8b3228548b58b701eaf9d002bb3b6907aeeed9f5e320cd. 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/QMFMF2548232.