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 0xf8fc183eb918d7b8d5d69d4ab7d2e43a02a1586125191d864988176f87cbca13. 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/c06b4046-462f-405b-a529-9f03b0a8902b.json and https://artists.proofprofile.net/proofs/artist/c06b4046-462f-405b-a529-9f03b0a8902b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Kotch Pon di Edge: One Drop, Pt.2 - Single
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 0xdb08898a28a47496bcddf68eda50d9c26905885f0fd199ff65311ba74d26c240. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), 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/USQY51450596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e044ca706b9ff92f4ea786d1a4c8eb7f2d40ac9a1dcf6fc700e6878cd7f2ddd. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/USQY51444670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7449f46e015f354a9ca4427a2804ccf9a07cebe108f2894d373f8155397d00f. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/USA2P1406748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf424683bab81206c24f05f5b9c84dac8d209d76af2d3af4610c2c319163c2e03. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/USA2P1606879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14d91678eb8a98a74a2c1a3227e3a5aee6c09f6d6732f2bf5789f348cb5647cd. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/QZ7ZB1700002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e9bbe8ad495592d417e7977f9b3e342aeff08b8389042b59f1e0a7d1b2911c2. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/SEVQU2000701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe67f1989034b1d6e96c2d96ec474e8078274f90641035f5ffe9fa712031060cd. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZ7ZB1700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52425379f70e2cfdced27d5259fb7e557a0e3ac26511cbfe978405f4ce57b285. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/QM6N22171698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x512f42088597fef7e7898bceaef42dade53ca1956b0a99ad5c606f380394a6fb. 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/GX53U2099925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb662bfac713f09a49c256ac944723b061f91a85d0480506fec75d16ed07b443c. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QMDA62242813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x629915468ecbfbd08bd830abce86878138f18503cb8350909e395d5eb5354de2. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZDA72308692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4efc16beea10a0004ff168a2d01c3e763335b7d024ff1a6463069839d4111cf. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QZMZ92542462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd283b0fbe4f53acef255b3f06fe5b6c84274681ce9e6b72d732c3e3f9e4b27a2. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/USDY41514064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb0d43a8061f9353ee51fc7a2663e478fc3fd54b48f8865af81ce0cd541aab11. 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/QZWH32500199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f2aa15d781dca1b0724da06de937143dee6831e16b3c1e85d4a45445350700e. 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/GBX721900285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67545ae9b36e7261ef16e4cc857ec25bb6e1708c86a0970c07a766d0514f625a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBX721900289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb343345cf5a836a9ae13e8b098e2c18c9bc958b291683a78f39888023cc9719. 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/QZTPX2481937.