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 0x2e34324524907b85a33adfdb8833708894a2bdf902bbffaac4f64840ee9595b3. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7ade670e-bfea-4f59-8aad-ee6bdcf8f003.json and https://artists.proofprofile.net/proofs/artist/7ade670e-bfea-4f59-8aad-ee6bdcf8f003.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 0x4e55f9a6093a19acd1cae9ebdc51ba5ad1223ecf22b33c5404ffb44864690d9f. 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/GBKQU2237581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22bb6b3f720b8975581b32220f7503f3a8fe86d2f36513b966991d5edc70c8bf. 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/QZN882184863.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37e70efae66d3eda8d147676bf783dcdf6528e388ea0a504ef758a051827264f. 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/BCD4N2200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3e6597b96b424036913e11e5647b36c64ce51675cef89c3536b12a6eb1f47b1. 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/BCD4N2200135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedca80553faaba1b391d663520e84826571dcd3936c7066e39efd2941eb8bea0. 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/USANG2248079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x798723f8246ae9715f88c7ad067e0721f59f133d7ece61234cabb608d8f502ff. 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/BXDS92200032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5854de6265db33617b7d4b59fff6be4c2334273c9ca138ffe539d480297e2b7. 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/BCD4N2300028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4efa8a8b2d44addff8f440b6307821bb22a406fe619617a0f7815c5583b956ed. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QM3DF2289066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdb6309bc00981248aa7d7dcf19a0b28764cde02279b75f517120549de86b08f. 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/UKZGC2302910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e6ce8cd76dce399fb8f9b4bb433326f18ab0214068428358da39124079f00cd. 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/US3DF2207107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81249f39fc62da35b64e4e6f04a242b81b31b2e353daabb7c932c5263422836c. 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/BXDS92200067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeff5510c167b043ab25f125a6defd882f70fc5fda5bb46dcbac45c3ac3e5e7b. 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/QM3DF2192942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb40b410da4fbc5db588ece521111d1ebff0bafa0444c18fef59d16827501811. 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/BXDS92200030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac0043fd576cc7c42f5bb4a1e01a2ff2d56469f273800522652bb605ecab9b10. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BXDS92200031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x798723f8246ae9715f88c7ad067e0721f59f133d7ece61234cabb608d8f502ff. 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/BXDS92200032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a50e9b9a00e1f73541e741c3be69e365e3b3c8c8b7eade3df7dbc7de7e768bf. 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/BXDS92200033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb54720940eb05e7ee0c8b2b1a3958a508101c994cbbcc4bf70c69f14eb4a291. 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/BXDS92200034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x362701b896fd72727c1b04f35c53dc529eb41c2d7f3377a0d0554391cc370e5f. 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/BXDS92200035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa821012be98469e987566c341f900ae72a96488fb29be9eddaf11204ec95e9f4. 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/QM3DF2143214.
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