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 0x7de78f4ef670db18d9b64ec943416a1915ae7a5338f90ac34899cba29db98578. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/764b48fc-5fad-4304-80de-281ffb0f9a50.json and https://artists.proofprofile.net/proofs/artist/764b48fc-5fad-4304-80de-281ffb0f9a50.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 0xf9299fbe23015cd7ad98ec7bc4f6e6ddd15652f644b21aa6dfb6f743277bf9fe. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/GB8KE2160195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8325d0b7be9b80571194caaefbfe94414e7d76203fa1c5e46a9b33d73ca5191d. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/NLCK42212081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e068131889e410bc34c56cb1121a9b3bd2de4f5e09ba13779b13035808e6caf. 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/NLCK42212087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed7ba91614f10232ce6fddf3a4dad01e03290634789157a10f0472f152cc75c5. 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/NLCK41096889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b072bbdd6551687869e6a730d1fed9157b323b77bbc2bdcdb43b4a314ed70b1. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/GB8KE2151682.
Tribute to Jabaru: A Call For Your Mental Health
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1d0b015d9cd1b5ce1eb517b897c7709b56ed33d768865ffbd6ff5c21c87dbfe. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/NLCK41081379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71a72f6ed445b7aedeb74bcb67303e9194122189df8376c0face2718b5c0d383. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/NLCK41081386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cb7f57677e0a5abb56eaefbd45f40352b0a6057e5a84f7dea32a1d56176f05b. 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/NLCK41081387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda8819664f8a187ad6308e22518ace1ec87f87a3867375e054c2b85241f816f3. 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/NLCK41081388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24ff808027c8d2814e65a97bcec2356c1cddeefd84aef84825d25378e2f7013b. 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/GB8KE2057816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa732470dfb160c8e2546433621d39396d5eb94bfd5d85cacb505df4b892c67b4. 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/GB8KE2323353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fbf35083ef05258f38117f859427fc1f5d710217ad904d94cb6eeb0f72f9140. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/CA5KR2514609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec2be537409575db45edb518af46f5a1647be0fbb7719054cbb1dfb2e89f4a10. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/NLCK42419605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae4fd11bb541d9f1e09df85fa528547782d77c99e0be91ea97c4dc06fb307cf6. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/CA5KR2501454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa36d34305b1b132593aed2d1bd3e6526bacd6100e7f489172d7a85976dce27ea. 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/CA5KR2501456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6a34918e84d58e3da4478bd179ed14a45a71fe439f27e6d01bd06c600543495. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/NLCK42213425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f266c5451a6c4084902967312f1a45c514a39f67cbe3466b5c09aba7f3c08e2. 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/NLCK42213428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa00dcee983a29b166a500eb5014ec7dfef60e522f2f8be4e397efb03efbb50f4. 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/GB8KE1957554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7556e9a7989ac05842335e76444c6d4548fef70ee82279f2d7aa5fa841d1280c. 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/CA5KR2528650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3da36bd73cf286df95d9cfb289a5cb4d5e31d6575b48fe50ab5080565290c116. 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/CA5KR2528651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8385d6bd7783dffbb867b5a299f1592c9d85c09a77fee4a8769f3d305b7ec6d. 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/CA5KR2528653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc51b140e2b89a0aa0924e611a87f72fe5cedebc3d45d06fbb78b7235fd580ffe. 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/CA5KR2528654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa87f47ceffad8ebab30683e14c04d09f022b9c3dab61e776f2af620c4288f16b. 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/CA5KR2528656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89d696d740812bf15fefd3e2f20469732454498cafa5db0f476f9b7fa51b7db6. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/CA5KR2528657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d33298dd80b35746d3e76f35634e6287751c31625a04bd949817348a8238b20. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/CA5KR2528660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fbf35083ef05258f38117f859427fc1f5d710217ad904d94cb6eeb0f72f9140. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/CA5KR2514609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7ed62f9f9f0c60fd90179178bb871eedb679b90b034cd5854395c221ab7f1df. 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/CA5KR2514610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf148e484d69e0bbbbfaf6acd5d76964009140f1571f0c816f0dbf1d797a088ee. Chain 2 (Bitcoin): anchored in block 960223 (2026-07-30T07:51:46Z), 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/CA5KR2514612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd23317680fa3abd023c32f79f7f73d0e9f08b7140e8d87ca1717ce94fe05ae91. 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/CA5KR2514613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfab49f0de19955fcd9e962acf3a80958fd196238fa44af0a3ce34a732beb63a5. Chain 2 (Bitcoin): anchored in block 960285 (2026-07-30T17:26:40Z), 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/CA5KR2514614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d63f7e4ebb3127e77dcca670f88b844a38a6718f3cde464f93e4357a1620c6d. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/CA5KR2514621.