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 0x22d5049a5e749dfb65d59b4374870a9e2df51449ef3ae4d6323e0af1867341f9. 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/0461f30d-bff2-40f7-8501-4a9fbeda69ff.json and https://artists.proofprofile.net/proofs/artist/0461f30d-bff2-40f7-8501-4a9fbeda69ff.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 0x286b2e54b8f1a02ba922729c4a87263d093bcb868216aa4a20271765b9862a40. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZFZ42011295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f975da2d3dc621eb7f66435f7e573f116ac43da627bf8ba6a7e3d88f1faa478. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DEKF22100784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6bb994f0ac73d8924da0a2551448578d2052450b20e5ca324f9bb9379fd208e. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/DEKF22101104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1be1fb994b53cc9a1654449374d6c2c001995769c040657ba36b67560e92ecbe. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T10:24:04Z), 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/DEKF22101242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe59d91e4dee95cf223f528d2fda02f8a19b03831f0d4d528f15bc0cdf81b80c8. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DEKF22200700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eee9027f77a837f782c94e67fda92898eaf223de46642e64f826a7fdb3e0077. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/CH7812367138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x857ada902182fd511f612299c3ebbb40602541fccebeb8025f11b996cd1c8787. 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/CH7812367136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c272a6de9f6bbc012a63ee8d24759b0fd10846cc413316076e661ba50735924. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/CH7812401396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cecd8a93db2c03ff734b0201914ef5a99c4b4c5ab3e86ebe6a8c75130893fe2. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/CH7812404071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81538b896421d0be0baaa6d8861e9d4d6eeaaab30184118cdd92da860641e0cd. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/CH7812407642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ac41b1c3d38a841952d20b9cf85c3cade146980ef020b88435b9c90849dc647. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/CH7812412157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x670c3553a6ff304b66b4ed2de67bd0519386aca857131844d719633868c4d6f6. 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/DEQ022150428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd959d3af87ead860d3ace96dc11fea6ffe5537d9540a334b1d913580b5b43a5. 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/CH7812344830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc5a71b275730c990935d1522612390aedb201f2686f7554b58d468d31c2f00a. 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/DEKF22401299.
Maradona (feat. Subasa, Moufasa 419, kt & FIlIP)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7980a9261fe07d48147bbfea4fe182705068038d590839d6b2d7bf270af522ad. 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/DEKF22401672.