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 0xcfbd07089e9ae5d53f6e014a18bf65ab7ac8883f1a26207782d79794606c17a9. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cb06a6a9-4241-465d-b797-68ad669de616.json and https://artists.proofprofile.net/proofs/artist/cb06a6a9-4241-465d-b797-68ad669de616.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 0x6c60b649971d8866011f4373331bd9ae596af1810f778622b5721c2679b60fcf. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/ES71G2338380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x757d3147deef6e6b5f26f3bcadebd4edeb583c90de85f46dfc810cdf6e7220dd. 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/ES71G2338381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f8a3b774c871da27fd98cea58c64f50db984740e4ff983c31901f48d0257346. 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/ES71G2338383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b70dd00d8d129d73b9e46f5194092c6d29ef639bffa3aefc45d377bb7f903ca. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:56:29Z), 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/ES71G2338382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc82541ed0d19b0448cbdded1979be6394ecbdbf8373dbb2589f00a98aef11248. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/ES71G2338384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x125cbee08b15c7ad18ec09dacad80ed1ab51cf0305e1923a4c9e3c3bf83ee58e. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/ES71G2338385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f8dddfad1f0181e57c1bf07bf0e39e2fee708aaa618fce5ccca566b15f04152. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/ES71G2338386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x185e05aae57f152d5d1176bef5860f42d1a27a3d2bab792f9c25a63b6914fbc7. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/ES71G2338387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8be8e830f142f61eccc9ed07219a5bda90dac295bb33ac03b2416d6a28653ec1. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/ES71G2338388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d5d3c98faf990c090de16b4752b8c4de316a596f46ba1e7d701b31f4781f1a1. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/ES71G2338389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29cb681c7d3dad5d783825760e3752aa9d23997f8deb0a0575f90ccc17141c5a. 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/ES8241865613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c62070bddc5d3b56584ea023feb176401ddafb7803757b62c1e601ca3e7a2b0. 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/ES94E2210108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1f7913801e4d25281c78f900571a1f1bde27efb8042aa73de4f1764d2d7b45a. 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/USDY41537318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa472976c96108592ceb4c80ff3598f7b9cef488fa9f42a820808d230d975ea18. 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/QMFMF2313143.
Europa Huele a Muerto: Homenaje a Flitter
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb474d8713e2dbfed181da8d406fc91122bc7dbe4a7a7392155c257056065d56f. 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/QM6P41873370.