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 0x8155f7751b03aba646e904b11bfae3c3694000491cd94398fab8aadf9980fe69. Chain 2 (Bitcoin): anchored in block 953612 (2026-06-14T08:22:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/15793103-b00c-46c1-a9de-692a9bc7b436.json and https://artists.proofprofile.net/proofs/artist/15793103-b00c-46c1-a9de-692a9bc7b436.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 0xaa2658c048a8adc3ddbbcad80a11d5442d5165941cb97a5ffa7e93a17d65dd87. 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/CAZ700901153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66e665446a7035c13ab03caf58a8d322bf60ecbee042c199dc8b7d2dfc41ce22. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/CAZ700901155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2d4e4c2e079ff95c6131414d6cee2d925176d4dd2c33395e44dbbc61e5e1b38. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/CAZ700901145.
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 0xf31bf153d24935501a9d03deba643b38b66d3aa2cdd8dfb22c200a2d793c3864. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/CAZ700901157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b00e541128c654caa280490dc5a57c047b3c0fa4cc10fb0cdd6a529652dc782. 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/CAZ700600535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef0dbf4eb3862960e1b6b023de37c7c9eaf2a8d281ad09b1a046480eb69ed32f. 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/CAZ700600536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc25ec475e00abd1e3d35abd0a16d87f8cd9d42f4ae18bd31c0721e47941b76dd. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CAZ700600547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5ffef2f2ffeacae6a67de7284df7396898e426c36020d9c7d2dbe9d3a14d26f. 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/CAZ700600548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbe58fc9bcd968bc147d88324c153ce14598a39dd3e1647b80f6ce5293643748. 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/CAZ700600552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14de4433132285ef5a18eccc1877bcbb145410b3ba588996dfd45e75e92ad90c. 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/CAK922100731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1657c7f9b8b273c1d88c97f18e99b83961fe945a18666480ba216e99615911c8. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/CAK922100733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bd81df93c869aa43e8b09a4dedb58c8f963e562aa2f98efd46474698e87fc7d. 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/CAU111019686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x586cdc332f5d5c85ef2a2967328d7443d80224b2d378e72442c036bfe6538d8f. 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/CAU111019687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3212cd4601d4e7d90a99d104bc7119775c68e96dccf7aff5792e07857b00d25. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/CAU111019547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ddbff7a3bbb090dedd416207fb35ccc6f86bd8eb38e40841ce04aec3822ff8c. 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/CAU111019549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56d8f9dd0429484847580a4493ff41ea7b84eda04bebc24f236b7a6427d85550. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CAU111019552.
Last night (i heard you crying in your sleep)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe53a2c0198a6e2a990bc09cd03a4d6e31bd6927c8f10c2332b8767f86ec5fc50. 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/CAU111019553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99428396e5db78ff13dc64ac29f25a8b31d1c1845684920b40662cebeaac773f. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CAU111019557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb6714c95919af4772687fd40d770cc055f9c08b1df99e772aa4bbfdc7fbfa46. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/CAU111019562.
Hommage à Hank Williams Volume 2 (Remasterisé)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x337369975fbf7f00eb3c1c75713c58ffe76e3bc381136b0dc479e02c7c0052b9. 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/CAK922102427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ce79271a63f18f6b1b5e6edaf14b55ba407a9f0d7d607c4414c151cd6d16b37. 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/CAK922102431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8421c7b93d22659f422026972a2cc8e75a618cc48c8a8938f4787a2e64d6acc4. 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/CAK922102069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf1523d619e78715e61849e4d055a0c5a2fa989eaa54a6a36f8e58658ba45d31. 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/CAK922102075.
Hommage à Hank Williams Volume 1 (Remasterisé)