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 0x772969cb3cc350db56ca97a1589967d7105436185faea02d76e8f5c628d66e65. 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/b4537401-dd1c-4771-8a3a-3c589a4e3d72.json and https://artists.proofprofile.net/proofs/artist/b4537401-dd1c-4771-8a3a-3c589a4e3d72.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 0x3384cfe630aca0fb8da7b86b6ccb1e926439101475b3431ecf7f2f9c1ff0955c. 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/QZFZ42319467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8c7f179e6dcb5b0eb8cf813b7a63c509f3b9eaf76df9bbba526f63630bbb360. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZTAY2251934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4557f4a23aed6ab20c5c09db57d280e4a9d62ff80f6fa95d43f5d422877f79b2. 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/QZTAT2270723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b6eec79446a7d09544f2c774bd532c7dee0d7145c0b3bd8195eac20af9a9241. 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/QZTBA2239801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2704dd36c639a1638b7ba26618e7663843ffd3a1165ef3ed02abf87c984ca60f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZTAT2272444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70a3feb4d100d95d6552a1d1e3b644e34388714e2020545d0c0d470272601371. 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/QZDA82399471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a207c7603dda8729fe343916c7a2ac8644d5a2c7c6e1752ac4e9d938a1ff75a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZTAY2251935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x100f85fd4bd858f18c70d8031158dc842655444386cd089067a7f73ed7360dc7. 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/QZTAY2251936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26dff650457e1bd0497487446ca1c03dfe8767a95c0d7bec94f1d70318efb749. 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/QZDA42331336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16f35d6d515d239f648eae85051027a175d062c6802ab1ca4b1d2418aaa3771c. 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/QZTAY2251937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf959c60229d3fed4ec42204d54f95e0899bd16f85d8a293bafccba73dedf5344. 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/QZFYZ2380302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e5748408e39f92ce82939f22e905cc37f9ff6dc6762ea3a95e9fa2a04d2d99c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZTAY2251938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x123e1d37927038f6a23b7323e93486c997702e671f9ccdd99d0ad04b48582b0e. 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/QZK6L2099359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fdea70894a82da4eb89d2b6f96d7384f551ba5e320fe4a8b4e4c31ad2e443b9. 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/QZK6L2099360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e02e6adc4420c7f20bc4cce64b7fbcda1921d10e39de7e847e1830779335862. 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/QZK6L2099361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2be9a864ebeaf801e5efa87c2a16f7984ec5b6c97fd27c49977ae6737577458a. 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/QZK6L2099362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2919a9ffc10ff0e4b4a0f96f4c3bdf79cfa50901e3097e86cedeba98eb33c3c5. 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/QZK6L2099368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd45c44be9cafc0fc71c1bbd0281c4221bf55fa751d3b9ae81ec5b57f333c1660. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:30:03Z), 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/QZK6L2099363.
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 0x91d311ea5cd55f44d89b5c2db3e9cb9cb008ccc74e21ae75da624b67b70264b6. 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/QZK6L2099367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe323773db97e79a915199f207c14e360f1e4ebd8c8c56d699db7ae7d2b1ac796. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/QZK6L2099364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe89e13a97d7c386771531e8131b6b857a733f3d1f186acc119188b2e33383ab1. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZK6L2099365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58993d0dc8955691cc8d4d22395a78b70cc86f302f8b199c5f06dd8d6c21aa31. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/QZK6L2099366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc567f89aa04cfa6cea87b9922bbdfcfe884b54c2e14a98c5ebd283f2c80da5f. 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/QZWFG2321204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dd813fbf19098c528aef8f989e353fe167e7987f37a4b13e99edc28e171feff. 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/QZTAZ2311022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7011452b417b028d2eb089f15a9adf124f4a9fbe475155c4f38354c00cc2ead. 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/QZK6P2184965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a4b9a83e95cd37b84f9582622692d30914d2fce724a91a4de65451fb7fd83f5. 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/QZK6Q1998206.