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 0xe85f71491b9ab62d4eb3fbd3e47dbfdfec51b5e85e0271fdb8e2b26f5bc647e7. 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/ad11802d-27d5-4d56-8ea2-5275345ade2b.json and https://artists.proofprofile.net/proofs/artist/ad11802d-27d5-4d56-8ea2-5275345ade2b.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 0xeff0d0271a8887bfd1cc67b8d44690d224ffb835bc8c9d7787d14ba276c64f65. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T00:07:05Z), 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/GX5MY2261096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x700d92c950f57a9868a666da27ea66600ac9af1bce9e78fe87cf364d71acf75e. Chain 2 (Bitcoin): anchored in block 956861 (2026-07-06T01:57:57Z), 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/GX5MY2261098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f05fff3428c47c4fa1a8fd8bdcf539cff3b03f4a88839c2ae322f5062a599cc. 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/GX5MY2261099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c51561992799772eab9d996f2f7e88f873f806d980ce2a3d455fae8bbb7fe13. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/GX5MY2261100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaac6c6a04b9a727b0b23c011936e396e45697b8c8f8209eaaf6f403f837047f6. 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/GX5MY2261101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x756aff2fec8fb7619dc327cfa10e253653771c9c34005f96d2bf3daaec2f3801. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZES72499927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4583aab8b5b4e9637771e2fffe2e26573f75c509373db28d76f3635bbb9dd2f9. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZES82433643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4952241f62ea6a392ae1b583b64c488e59326c9127064269fb02170419d30e75. 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/QZES82468620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1e27e3b3379a58517fc23ebe417c403aaa8bf53b79ada091413129e8958be19. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/QZHN32413223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7f7e51105b8fadde13ad9cb8b6fe3b6ea1d04758f5f06682c50676c606f908b. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/QZHN32482305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7f7e51105b8fadde13ad9cb8b6fe3b6ea1d04758f5f06682c50676c606f908b. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZHN32482305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4583aab8b5b4e9637771e2fffe2e26573f75c509373db28d76f3635bbb9dd2f9. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/QZES82433643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1e27e3b3379a58517fc23ebe417c403aaa8bf53b79ada091413129e8958be19. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/QZHN32413223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7f7e51105b8fadde13ad9cb8b6fe3b6ea1d04758f5f06682c50676c606f908b. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QZHN32482305.
Lounge Bar Slowed Reverb (slowed reverb)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaac6c6a04b9a727b0b23c011936e396e45697b8c8f8209eaaf6f403f837047f6. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GX5MY2261101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe51eb6ccf75d1b3ac2057c7d0d61fe4d386561d310c6924e062e1d631c06e51d. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/QZNWX2555685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa32f6f97524b49735bc0d7b7d20fe5dcbbcdebc933fb9f6fa4889f02e35b245. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZTB92573000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc693515acbea047f0b16b665384a70650f33791e891c344a785b99a3f13ad3b8. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZTB92574513.