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 0xa3ca840fe12cd703030fd0939b5f0b25e2de6adf81f66b688f9b0c6586e5d72c. 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/0f95bf91-d617-4469-af81-e96fbff6a7b3.json and https://artists.proofprofile.net/proofs/artist/0f95bf91-d617-4469-af81-e96fbff6a7b3.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 0xa78a0eaa3c2a0aa322567e9f161dbb133873f32ff05a12bb41422083cb1f14dc. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QZW9K2391528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0520d857bd3ab5c4a77e39242e6d053a20ce7c69198aee4ee3b1226c994ad6b9. 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/USL4Q2245283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6798a950c3faf8f330b6fb6c78dba4261b884eb86df7463e51681e6aa5ec0df. Chain 2 (Bitcoin): anchored in block 960145 (2026-07-29T21:13:37Z), 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/QZNJV2266813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebfdf6d8d9168d68989dbf99c520851e5b76df6f37863abda0e216ce36cd22ce. 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/SE6HN2440126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff80f4ca73f0472149133722077c5f32b349e591f63534c760a9e8269bc6ddf1. 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/QZW9K2379233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x495672ea65c6d08e93dafb028c8045c1eb16c1e7d40fa8662f6975d65ef296c2. 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/ES50A2300659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc136850a0c5e23af37732b9b69a7b9b35be855525c7087d91e5a00751346b806. 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/US7VG2396846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1ad5226f53fc3e990be102cd21e9c1115e2456ec4bd43ffbe69faa493cbc90b. 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/QZHZ62276769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1744bcf6ed42b398246ccbccbdaac3a9e30e6db8d9a816dcbd99a2c9c7354581. 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/QZTPX2102531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77e6baf44e7dc30bc20181cf341dd177db789592f0429c0e985bfddc0a56dd30. 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/SE6A92139993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x821fabbf94e0a8234eae2e5ce422824803440b21c1f150a03b5461d15c234bc5. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/QZK6Q1943518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c7708cc22250d108197f445a52f6e7774625e05368db2f8b485aeb80ae4fac1. 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/QZMEQ2010791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb15a594852cd7b2d07c4bd0dd5989b86be02d88530886989dc5b7a94aad93ae6. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/SE5BU2476249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ab8d57e6235c57d5e905df03e762608968bb925a51519bf4c4052d3bc594ae8. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZW9K2379353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf52df5580cc75b9958e6ba5c9b80f09eaaec6378abae6306d26322b8d8df2870. 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/QZNWX2296379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x074629efe95dba35a68ef73e651d7c1c45196c5d26ed8a287a0535a68fc4346f. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/US7VG2550558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb46d46488899574f98cf9722f0ccbc0cd3f2b82f2549aa95ce91db47c978800. 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/QZRP52323141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf02178eefb1334a5573dc56abc63f010e9b436c194218652852e42825760b556. 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/QZRP52323142.
Sorry, amiga, pero... él no es nada sin ti!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd82e252bd49bcdf7ff5c0334787201218b977ba2086b969d26eedabdb208ac93. 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/SE6SA2403401.