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 0x2d1e547be91da2b1d1daca1ed647f0e9cad574a0c43d9c6a2562a58dc483234a. 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/7ff8e91d-f945-427d-b128-5adf375e1daf.json and https://artists.proofprofile.net/proofs/artist/7ff8e91d-f945-427d-b128-5adf375e1daf.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 0x1ad00f41ba0eab06b6e2a8a969b7ba733ad796b70c87571d943fa323b91dad77. 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/JPPC02110812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0af6200d7e78d50135d9f4f4a35c4d68117c0d1a61eac46933d449a3fdff37bb. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/JPPC02110838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13e877d88fbb7e804435d4088046199baca8da870448f7889bfc277834e5fefe. 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/JPPC02111257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50ef837d25581622e6e70d285da0f647a13d991cb091a73fc3f96651fa84cf95. 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/JPPC02111648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd22299102070a8560fb734a4a893b3737509c89b2a92ff2850c244f72287dc7f. 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/JPPC02111646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ebb5db46847f4185b311b7e045178a46adcb979d8fec0b450fe685ff9b1b40f. 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/JPPC02111025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1da6751476ec25f05e2d09f6fc618c0a4ffd7b7de3d11cd4a02e020f225ecd86. 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/JPPC02111553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ad00f41ba0eab06b6e2a8a969b7ba733ad796b70c87571d943fa323b91dad77. 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/JPPC02110812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13e877d88fbb7e804435d4088046199baca8da870448f7889bfc277834e5fefe. 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/JPPC02111257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc998bf3cc704aa807e0eb73874084347b11b4ffc51dc920fe6f834929aa642f. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/JPPC02210409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc998bf3cc704aa807e0eb73874084347b11b4ffc51dc920fe6f834929aa642f. 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/JPPC02210409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bb2408459aef60f6e41f26533758cadfe3142568a2489b83990d67466a6465c. 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/JPPC02310898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb72b897d7e43bb512fdddf08d5db3204941004eb8fde024709383dbd79b7e105. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/JPPC02311085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb72b897d7e43bb512fdddf08d5db3204941004eb8fde024709383dbd79b7e105. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/JPPC02311085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ad524b360d3d0a5451a78da35b5760b7e6dd299134f6bddda3e1f314b1f087e. 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/JPPC02312177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x592b85fd2bc96cac187a3cc55bdb93df6d7de8eb88e36308ebb1ed7a6c0feb90. 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/JPPC02411378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x592b85fd2bc96cac187a3cc55bdb93df6d7de8eb88e36308ebb1ed7a6c0feb90. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/JPPC02411378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb72b897d7e43bb512fdddf08d5db3204941004eb8fde024709383dbd79b7e105. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/JPPC02311085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4caa50e5fb3151e740638cdfd6cfef641323286728e980574e2a07aa4fb77a12. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/JPPC02311297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bb2408459aef60f6e41f26533758cadfe3142568a2489b83990d67466a6465c. 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/JPPC02310898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb72b897d7e43bb512fdddf08d5db3204941004eb8fde024709383dbd79b7e105. 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/JPPC02311085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4caa50e5fb3151e740638cdfd6cfef641323286728e980574e2a07aa4fb77a12. 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/JPPC02311297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bb2408459aef60f6e41f26533758cadfe3142568a2489b83990d67466a6465c. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/JPPC02310898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a032a372bf6cb2c8cedbc4b31d4af99d566cbef79dac9965a063daec9edc4d1. Chain 2 (Bitcoin): anchored in block 958369 (2026-07-17T05:20:29Z), 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/JPPC02510655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccd811155d2aa5b592d9cd8ea34d50df3a3ecd6ccf26a1ae129de30c0e0d85d0. 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/JPM792200122.