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 0xbf7dd597051e4bbf7a15e23b2d44381116dc655d9281c9ae393e94d507a5db2d. 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/150465ae-040f-470b-b3fe-d323bca225f8.json and https://artists.proofprofile.net/proofs/artist/150465ae-040f-470b-b3fe-d323bca225f8.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 0xe9ecf165772e95b0760d15a6aa2a8d16ae227eb2c263ce35b7ff4df6a79d3987. 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/TCAFD2070680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11989c4f25956b06319551e8208b111a15a37bd8fa3756609f1a4c5d45adc991. 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/TCAFD2070684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5067547239702f82ba1763a1791f4946b3d1ad0939eabb566e9c93bc0a0b01c5. 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/TCAFD2070687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe4c2b701b008a8242621f3dd6be5ca501a96cb62f8d38a8a91d608df347eabf. 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/TCAFD2070689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc919c440173c15f5339047d363b8d96c66077e95c8c3ef90126d7f47af23ed82. 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/TCAFD2070694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe546ff6959f63fed65c967a062c0616d9c961f78e182c0b83686fa1bcfd1ac85. 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/TCAFD2070696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf768b192758605077522011b3fb23fe28777710d23d28fdbf51bfa106372d3c. 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/TCAFD2070698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d9625318043a8452e6040b989e4488c79424fdfaf5f5e8adce04abecd02cd59. 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/USA2Z1901216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10399ad4141d9495e6025dca1bcda1da8ca17d821c678894ce623ca1f8284211. 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/USA2Z1901217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x784845b73504a6df26003f883c453c3174fb357fc8ca7604c0406444951ed04f. 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/USA2Z1901218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa424ddfbf6117a53b76619874280148f9733c937db783882dc7f03c467549498. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/USA2Z1901219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a98d416da16e0d4ff42ab9569c6b1f2cc9fd750542f2698ef7fe70b2c6e4bc6. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/USA2Z1901220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x749275194686614d741f98d709180e8f57b0d24b52660e0c51fcf260f313dc1b. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USA2Z1901221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89425d7794acc2f1de321d30bb8e1cacbcd107e5f023a9c14ac2052588c12f2f. 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/USA2Z1901222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92bbbf2615831db435cbd2c9bcc31fe400c21eb415418b72e75b863eec0aa80d. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/USA2Z1901223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb254205d377c90affff3ff2c802bb671963e52c0917cec42368214f885f3e83. 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/USA2Z1901224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57cfd70b57f174196e2ba44b7e866e5144c2e1243ccfb490fc2519c02c0605e0. Chain 2 (Bitcoin): anchored in block 960349 (2026-07-31T05:23:41Z), 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/USA2Z1901225.
When the Morning Greets You with a Smile
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30d938d7123f995dea68a40655388b34467592593b03c97a6b09d00d524b9bae. 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/USDBY1800220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28865b0f8dbd784480e9c36029d44f6b84e0eaec39c939173f02dcdec109faf8. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/USDBY1800221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11779adffb49f373ea275945a6ed32565f781d17b03fcc6f4b88a16da7c05598. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/USDBY1800222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4080e47f7ec36699180c5023ac1eb2797ca8e7240f92da51cca7d7c076560fbe. 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/USDBY1800223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5a8f71806c74f4b875587193e692f12621e318e08d23cd9f38394ba8e4ed5b3. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/USDBY1800224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee5d52449eee61a9dd49a201cf627da114e60025eb69d8c716101638854ae9c5. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/USDBY1800226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x705186c4f98a1a403de2ddf22b4f8ab013d0aebf2e3da7886b79d746a0c25bae. 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/USDBY1800228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44c7208d5e7713d8b3c3f5ad87f6974922ea0cb22db447baa3693c181622c64a. 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/USDBY1800229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3474e9fb81fad640b0f3c7e532153c3602688dbc6235f9b909097331101c20b3. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/USDBY1800230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4856d5343c11adb7dc13b2776cd44a05bea3fac8492a0210c8df4b01387fe76. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/USDBY1800232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81c1edb3f36ce397863fe5790b308342e429b69ca4720e30d7646038cacc281d. 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/TCACN1681004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22d11804e0bfb0a5563ff0a8190c2818f74f737d093d11238d7fe6d61c462a6d. 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/TCACN1681005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29dc47a995643efb21455f4ec923fff84c3e3109e7f18cc99bf40019b097579c. 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/TCACN1681006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99b503503c2a35bc1cbe28cca674b819031a5b66f49ac4b7213691b4d316eb50. 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/TCACN1681007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe133ceb25e0c8c630132f9a309f51bf9624c6fccd02ad288986cfa95df58de9c. 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/TCACN1681008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x976299662477fc4b464103eb2f5be03683a094fd5bcefcd0641898bf46356f9d. 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/TCACN1681009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd48cfa7c86ae2a1ce853d24d06ba906ed743ff310ecb9b32c3df761225e0b85b. 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/TCACN1681010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ab8c8b244c71776ded92a7e5cf954759d0753171e3f75605de5044d5c4f8440. 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/TCACN1681011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83151ef021f364fe846549f43dad2108a530ebfdbccdbce748d90ea6e6d937a2. 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/TCACN1681012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a69adecd74e58c50570af71d8f2de9a8a03da18352113f62385067f3dd31bc3. 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/TCACN1681013.