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 0x85a5da33f37490c21fbeb96b89b3c50501c8f80c20ba6e4ec600e21bf994caea. 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/54604f05-d68a-41b5-a496-70118eed3998.json and https://artists.proofprofile.net/proofs/artist/54604f05-d68a-41b5-a496-70118eed3998.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 0x63573044fb457137b654d43d534a744403b1f2cc97bc8d68977304ae72485090. 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/FRX629390020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21e8e1bc778e984db1532537455cdc6e74293db875e619d981a73b53f637003e. Chain 2 (Bitcoin): anchored in block 957569 (2026-07-11T12:44:25Z), 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/FRX629390030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd828b5678b9010514c4e0ad297d665cc310a4d2f0dc7cc24a489a501eaddc702. 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/FRX629390040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8854313eef640a3fd7978b71075b885b145b4b115592b932709622a7c37ac952. 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/FRX629390060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d12deee3e76e0bdcfac122a82f464ae2459cc7d6911899446335ba43654aa82. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/FRX629390080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x870725863aedede13e3fe7971475a2f594979275c26d84e38cbd9ccc03098ad2. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/FRX629390090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f9c76b3db6be76382be398a84fc0020ae96d4db511d48f7693f5e5c5d50c615. Chain 2 (Bitcoin): anchored in block 957573 (2026-07-11T13:43:13Z), 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/FRX629390110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa66f18e096f230a36596bc0130b60c43893f811780b146c780c4749c2745f215. Chain 2 (Bitcoin): anchored in block 958051 (2026-07-14T19:14:42Z), 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/FRX629521001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x415e8b3977123a6a694c11868bcd7b92d9325f8d9aa4d11c44b94160a0d2ff28. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/FRX629521002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd964a5dbd199b6f431cd564539b36682ca4eff6093ceec6aeaae30442d2f7570. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/FRX629868020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x740d8ea548ae888cde0c26cc6547dcac4cb78dce61c7b49bf8cb9ec66b76c512. 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/FRX620026090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab8c0dca278b23342ae170af496ef600a745dd6a4af64dad4a529d9c193908a5. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/FRX620558020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb1b166783ce57b7a97ccfef5f5f8a168d8dea94a2dcb279452568db84084380. 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/FRX620558030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e109fcaf54907dcfa1d2a7b2bfb2a4ec47f32ff127c1afcfa2a7ebd104c2a99. 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/QZYFQ2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x740d8ea548ae888cde0c26cc6547dcac4cb78dce61c7b49bf8cb9ec66b76c512. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/FRX620026090.
Ô Espirito E Âlma De Cabo Verde / The Spirit & Soul of Cabo Verde
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc715afc6bb0a46d00bdee8da41f8e38903013863f48b40e8c520ca2942fefb3f. 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/FRX629521003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cfa315701c27dfaa346f507f93dc088ee3cc6ee5d257ddf54008db608287206. 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/QZYFQ2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb1b166783ce57b7a97ccfef5f5f8a168d8dea94a2dcb279452568db84084380. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/FRX620558030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9edbd3f5acd541f9220692f4daa178c7c255ee176353238b432ecd01b5d24f02. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/FRX629390010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8854313eef640a3fd7978b71075b885b145b4b115592b932709622a7c37ac952. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/FRX629390060.