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 0x720c66b2aeceef7feaed4f920a3d18fb94ad7ff134c82297a7372bb9905b5a69. 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/2e35f881-cd99-48a3-80be-6ae6701cc233.json and https://artists.proofprofile.net/proofs/artist/2e35f881-cd99-48a3-80be-6ae6701cc233.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 0xe17da6ef90f2724cdc3f3d18ffe655eb7263329797873d2d9f27df671fbb0d7a. 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/FR9W12350979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37ef658b483468f2ace0080c274cb7d3f52905fd62cf2fe3d627f148c3f3008c. 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/FR9W12355186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28ad0f5a9f73a6937afa09053ffed298c892fb9a74117dce0209dc6ed8100f13. 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/FR9W12350986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8495af50645fa3e3d12bc7f39616970380a3808a05f1ee9042fd8d02f2bbcc87. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/FR9W12350980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a21b050e276d73066d6e559a8057de109dbe8cc80cb87751ae26c79023b5eb2. 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/FR8MA2400081.
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 0xa51638879813f857223e9087f469b0b67d2e4371c198b896a02814c934038ee6. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/FR8MA2400091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x542f1ac9e4cc4213d787ad53ca7d3ea433e9a2937fc905be7b28ff52e4f87919. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/FR9W12350984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4125e542bb759dd7120d381d3d200c21209986fbab879dda1b50b345b08f65dd. 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/FR9W12350985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b07eac7a0c80201d34addd984d049100722cdb71791cddfc003ae2b52c90eb9. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/FR9W12350983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29517ffd732527b67f37e70ebddee6a4a7f09e2b99a6245ac2b708c42f4ba918. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/FRX851400457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0077829228888479e1ca1e04e5052ce9b772abbb8adc039e5050b2cd4c0cfc6. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FRX851400459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d7539d241cad4e9d33203e56cb7db0f23cfd1f4a34bcf88ba507ab618ad6a2f. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FRX851400461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c4d103669c496a16106e43a4145f3a2ec98d473a3ca1f134e74a639142a5de5. 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/FRX851400465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77982d29fc5fad07cdb6cbfd80bcfd941e1885adc9eac8016a649ad37e4270a8. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/FRX851400458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe33e973296139165df09af9e44397fd933edc84629242cf32ed921f7c6fb8c94. 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/FRX851400463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75ea54b9d4b3adb1bb8ea75912ff4ddec1770708b3f8d3385b72de733ffb74a2. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/FRX851400464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x288f9e177b75f71c1ce9c34af6158c69206e8e0458cbc9df0baa6ee6b3250e8b. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/FRX851400466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbe9096cc3543ceef274fe3c2469285872aaa5e1eeafe88995d0f1930bdda2fe. 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/FRI421100020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedb30e912892ab0a1551dc1a5d2212f36dd5474f4ed038140dfa7ea27411ee0f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FRI421100040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75996c2f6b87d3c644e315f0f880b5e5755aa5c2b1bdc1ad8debee26d33e0981. 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/FRI421100030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6b280d1a6a89864bff9c1145acbb5c4cbf97a7a1995eacc223fb3158f665349. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/FRI421100080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4b19fa3cdc5d822b4c31e317bc67e8dd35005bdaf99ed12b71d74d7c94688b7. 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/FRI421100070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83b3e3cb9ea73405da9310c9a20e25afc7ba889d3cd6bf8f910c267da15a446a. 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/FRI421200060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6632fe088bdbb5f9a9d2fa1002df65b5c7438de8f6fc8fa54b38953d4642e1d. 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/FRI421100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6f5ec24e13365b26ab6a487bda29a01a2263a02d1dcd4af908ecb19bb59e278. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/FRI421100100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbc73381e15bf19ae9696d317ff93dbb0101d387430ff8110bbd58765b0f1695. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FRI421100110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b489402f9f2600de795c340c65fc44d72b3d40e8f1093ac243d1efcc96ca0d6. 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/FRI421200050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6875125f938065e29a5296fa2aac025719db611a554e2e33286ff589b299a772. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T19:08:42Z), 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/FRI421100050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b473f7a4b977e722d4a69e2f96571f57bc989d1a190404de934e4965743faeb. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/FRI421100090.