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 0x65b80cea2dc16f001a979d077da86d7a02545a5fa249f7fbb35dad612b822060. 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/28965be1-f60d-4fc5-ac33-ff548fe64811.json and https://artists.proofprofile.net/proofs/artist/28965be1-f60d-4fc5-ac33-ff548fe64811.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 0x15d8a99c919f9e31074c293e7d26076a5855e1691282f571e1a24b820a754609. 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/ES18B1804326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63036ba665441d43870569821fd569193b12ba506b89872e4e130dd5c9f7688c. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/ES18B1804331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dde8b6b45cbe7ffa79e1a9d14bb27ba4fb6c7b0ba76927e4829ff71f79dbd6a. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/ES18B1804332.
Mamáma (Terere Jere) / Quiero (Guarani Soul)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d50d2b6f196a8e14880cca29b728b8362228a76b4aeff7288df8c36686a9256. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/PYC842301422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08dceddff43a43510d2b446dc95a1cf8907a8782a92895630c89ddd7097f6cfb. 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/PYC842301423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x012bdfef211cc4b9c6296b159e7681a670f6e4f76c194c0f688c22b98a09d31a. 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/PYC842301427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbb1ea2ccf1f6e5d4a52e0e42b1330ed0911eebee44bfb8fa5e244aa2fcef9dc. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/PYC842301428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff9c14d797bcddc4c5729a9d7163eac2ef1d60d807badf5f1e546a06ef856d2f. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T16:58:47Z), 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/PYC842301802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea57a8c2416d48cbc80be450cf7538d43e437b2dee1ba0ad293b472937be9d91. 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/PYC842504652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x935fabf4fb2d8f56116eea0b023e7f601045e5b39d6f99063ce2139b22370125. 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/PYC842504653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf391f931f0f7d426cd2a4be3cfb956d121a45065ff4a9d7d7fd25168a3fce98. 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/PYC842504654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaacfb310620cda5010bf808340c8210ab2dff13fb3cc585bad958dcbf05cdd2. 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/PYC842504655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52817204993f8285b8c59af50fec83a46e99865440fb5fa7d4c240b229eff2a3. 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/PYC842504656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6efdf95874698e1d6c880b25861c4437121effce575e0be9ae5e0cd5c9401953. 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/PYC842504657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e824840eb44b9a56eb699d87706651cb2b26c391b0a8e30ed98929fa072f390. 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/PYC842504658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe25b61f5804bde6f89936e6a6bd499d6df2625274395645d7e698732851e99cf. 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/PYC842504659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x223b7f5d8f1a39443043e7d638609ea9548bd9a31a0ffc1b52720e9e9e1bf300. 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/PYC842504660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1721f93650b0511eda6376ae948de7c1db85a5f91946d17794e76119f0bbf0c6. 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/PYC842504661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fbb6432b819885ae76602e28c7f18e2bd9684e40aab7d71c8b0bfd122d98505. 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/PYC842504662.
Mombyry ñaimé rire (Cuando estemos lejos
Recuerdo de Ypacarai, 70 años, Intérpretes varios con la OSN
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43ac209eb3511f83333770818837de9dab2e477139e5e1efd2c8a215b3f4b1cb. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/ES18B1901259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x316b9d06def9af65b6bb5e0a6338673603abbb3d4223ef93459a125e04082b29. 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/PYC842406925.