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 0xbd3e8fae6c11fa1948c1a25e284098549bf29edd60eb58541bffbb21ff9dd598. Chain 2 (Bitcoin): anchored in block 953758 (2026-06-15T07:48:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b4cc5baf-349b-4f84-97fe-0d89a9456e46.json and https://artists.proofprofile.net/proofs/artist/b4cc5baf-349b-4f84-97fe-0d89a9456e46.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 0xfbc83b4083139480b5d9db3e0511fb6f4ab748bf90b8791fbebce6491c33c304. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/US66W1101107.
Maestro (feat. Eric Bobo & Latin Bitman)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x317d0042b8782726228f62076ae95920e46b6979add6a400858d35d2f287e0d6. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/US66W1101108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b2a7e695ccdb06f9a68ca5286352845e5433dee3a9bf9a4db9886427321219b. 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/US66W1101109.
La Calle (feat. Sick Jacken & Ana Tijoux)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0309a5b1991b1940533c3acc4c83c10d3d983f014f7a53bf4752a9d0dc09f3d8. 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/US66W1101110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d2bd8f4b43ae9d7344295b578d7ead208a98e42e97e6cfb5d654e45f6c43241. 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/US66W1101111.
Save My World (feat. Mix Master Mike & P-Nut)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5919f70248413e026cb3c5ce5e7bee93246d39cc2d0d747b54e4686eea7c720f. 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/US66W1101112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0fbcb9e913c1af82797da6f5422d12243c098440c27b05a4c7aa177d106a8bd. 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/US66W1101113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd5b6c5c9a75f628e1f56e5b24762649f0b49828c425e610c7af76e4793f4eec. 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/US66W1101114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58e40c7b530e23584ff224c61267e4fd2d4a7b2d2088f023539cc7939fabbd90. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/US66W1101115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfca8d55c9ff584510dca327aae09ec01f6f6fcdc70cf7b645989ec157c9d5b71. 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/US66W1101116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde1270b50d8124a8ec50635a33b71dc8e360c3f42e1295f5394fe588a867bad3. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/US66W1101117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e2d092e9f662e11cede5d52adff69cb4d47e97a8d060bcc812e76e0e47553ff. 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/US66W2300051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca46876f6050642ec3e0e171da21f5ae67454304557d92342901e2997171558d. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/US66W2202221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0fbcb9e913c1af82797da6f5422d12243c098440c27b05a4c7aa177d106a8bd. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/US66W1101113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0309a5b1991b1940533c3acc4c83c10d3d983f014f7a53bf4752a9d0dc09f3d8. 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/US66W1101110.