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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x537f85777bf3345447488b930920b350a1ac14528e0b79bb348625dd9f6f7ba4. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/44e19957-849c-4a61-97d1-fa28d846edb8.json and https://artists.proofprofile.net/proofs/artist/44e19957-849c-4a61-97d1-fa28d846edb8.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8a5c942fd1cf408d4aa6c3b9e3f2d66adf1eb0d6f3579811b8ec1b1fbc477e2. 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/ARF2Q0200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xede7801522117ff24d6ad9bc2fd2ffcf6ce1c717f26ee29fa5ccb9d2ccbf2904. 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/ARF2Q0200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe38cfd68c3ea97feff3cc0265fa62ffca8479b2144b57b9fde3e4129b915b701. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:50:25Z), 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/ARF2Q0000011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83acf5845b9575617d5a76abcd45c03b27a6bbd7d91de39350b7ee7628dc8283. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/ARG601100867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x962b501cc06cf0f56af6509886aa486d10d82055c5e0bf1312978044b816dd1b. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/ARG601100868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x383345ba786eb894d94873e9a6220cb4159b3dcec981fb85d63f8d1ad389897e. 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/ARG601100869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb47681dcaefea8de1608df9321fd787e016a5e9f1adb853e907222c217673ed. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/ARG601100872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf2fee6026db535b7c7d3854743ee53eb26906cc4210ba299151f48a2c4270ed. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/ARG601100876.
Chacarera de las Cloacas (Cuando Salga el Sol)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x737e5a5d376a0ccd43bdc9de586433da36826df7a195ff942d1248a6de70cc64. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/ARFSB0701282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc34e62a7137969a746c55d875d8be89cde83b84b39c67092f90d726f960dc48. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/ARFSB0701283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93adf738a70c55576946ec5f4eb4a857d770003652f809c485aee46fd3c90ab9. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/ARFSB0701285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e2830d343c662f3b940310b3b3a722e4663bc8eff6b7c0813d0e09b9679f4cb. Chain 2 (Bitcoin): anchored in block 958051 (2026-07-14T19:14:42Z), 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/ARFSB0701286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc63e7e6e3334277680c4b2b5f1f3159ac9f4640ca4a576556e87dd3ecf1263ad. 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/ARFSB0701287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x311e76569f2c0f8ed40f668b2a6d623bea518d88f544c53c83137ff762c9b7c6. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/ARFSB0701288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedff92e0aabe055351a588649d7d900daf5d3f6446edc72f9b37dd403c659643. 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/ARFSB0701291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08ffa9c3c6e436044560e3fcf56bb1734e138bf721df99f3b1a9cbb54bf538df. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/ARFSB0701293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb59dd3aca4703cca980de7ebe48f65e296132b11875e21b724297d6a4ddbebe8. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/ARFSB0701294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3274a6ea5a1ca0540ea423cfe65fe312f641b50c8218307a33c48a827352773d. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/ARF100900639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3094b6edf9d9884c89dfda7c0fc54fd7918006ac114a3274ca015ed72383f2df. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ARF100900640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe86789ed6ff40085ac2cb0162177b5c2564e48949a0564479107df8f0ce1a161. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:06:45Z), 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/ARF100900641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d11d05104b060e6dcd4716522d21d244c1313c000e2bd1f03811a9221e4a854. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/ARF100900643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9293a8bba954c0b9b64f6359196cb524e8eb782380104e39c32095349acff4d. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T23:46:46Z), 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/ARF100900649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb72f19b848ead17849103c7c51fee9d040cf391297cff8cf08174dc705ad151. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/ARX861200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e78a375ac4eb50b63d0d3fa5a2a94944cc8efc91fa1b614def832e9072c495d. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:43:27Z), 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/ARX861200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadca9ad937215c12bdcbd7186544cc6d7b855c0a98fb1acdaa16ed11ca50f5cd. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/ARX861200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ba1e5c73ded09b292eeeeeccbaa51cfca8c2abac3a23228187727afb3641661. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/ARX861200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72ffe2340fd19fd5a8fd1240f821a865602f5de70d591df5418f0913f0db5ab2. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T18:55:10Z), 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/ARX861200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6414d00dff7cc1d78df9c95e80f50e23e9f1d9175a71c3122452050a7d04e09. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/ARG601400635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd38cc6e79ce0c8b0e411670ac67bf97a6d245464975645386674e0e3722e59ac. 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/ARF2Q1600003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2b4022c8c61ff7eeb4716222cfe9f86508b41aa52a39b3af814ba51e06e0301. 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/ARF2Q1900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda84f2191c795d1d9325eb927cfc0e5db89f3b3690a2aa52c107ed2a68715aec. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:33:40Z), 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/ARF2Q2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe9f7466c15d9dee0ef4be6b5ade0823f3797e97fd4465dec3c73c7bea8d5a1e. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/ARF2Q2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e5606ec2fe2eeb3cd7450d8dc4357264b58ee6026ea34546d1c18264d170ce7. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T18:16:30Z), 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/ARF2Q2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2b4dfa4cedc9bfcb066d6ddad5a260cdf11fe352bfd9528d574d741beba2401. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/AR8TN2400214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d05c46b758d49d6fb213c5bb40ef7ce82fedb3dc7017dde40601e5ba2af7be6. 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/ARF471200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95678b2fcf691fddb49e76353471b672789ba465865ed02d0e4a54853a0fcc0b. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/ARB621700015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85a6fb07fcd7247fe5e380fc95339f854f14f09f986ea715b96beb84c9eebaae. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/ARG601000371.
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