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 0x73e46fe5c901f36be022c1c43b46a2e65098a53066556fe6cb42fe13d672ab04. 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/f8ffec11-6e42-464a-9b57-577c4eed9bf5.json and https://artists.proofprofile.net/proofs/artist/f8ffec11-6e42-464a-9b57-577c4eed9bf5.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 0x59afcaf7801e05ff3f20ae93c0b37ba5091cb1caa424bc8f25c6ad995d2e7e58. 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/BK4DA2314128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2f71e51282875a28100c4daa7dc97b90cfaccb758b63cfe3a71e7071fdd0a2d. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZS7J2347948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd150d66c548ab38f38e1901aca041eb2ee9cbbd91bc427b2769fe36e9970d230. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:46:31Z), 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/BK4DA2321653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a2258abca6a84f7bda53ce9da55d8a1f04e16af375f37013107ccf34520ce01. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:41:50Z), 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/BK4DA2321656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55c55cc7103bfe3e13294550194d8a4c2fcf581037809a35eeb9c261fa3cc708. 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/BK4DA2321655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc9eeeeec3dd6c138bd59e72a9a735607931bb7f39bbf1a1273813bad1a7cbbd. Chain 2 (Bitcoin): anchored in block 958697 (2026-07-19T07:58:24Z), 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/BK4DA2321650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98fde667b1b22704b8de528b24133131918a697cf4334c77c4af71b50c0f4ebe. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:48:01Z), 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/BK4DA2321652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccb11be484f4dba577fb4123a1550dc3eea72ac2255e8c7102da01a8c7ed6408. 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/FRR642400324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccb11be484f4dba577fb4123a1550dc3eea72ac2255e8c7102da01a8c7ed6408. 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/FRR642400324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b779d0c3e0289f7ce8fe80e8dce56514dde22af994067b701046598a4d41ce8. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:50:55Z), 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/FRR642400406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x986ffa471eb0546d784838429c7da93f2ad84d8d05dd0c636e8e1688f172db8f. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/FRR642400407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d2e6df1691ecc6fcd0a84644e038287778d3705ca635c5f3f38c8721f222e42. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T21:50:14Z), 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/FRR642400243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b779d0c3e0289f7ce8fe80e8dce56514dde22af994067b701046598a4d41ce8. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/FRR642400406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02a7876eb31dda9be54f0e31d807e25e9960ee12a483a4f71fc8f2818f83e606. 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/BK4DA2426764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc4b8c568014148bf9056777ebfc2d1ce825020a2b0909fff32e326d829d2164. 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/BK4DA2448779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x076b548beddad99f2ebf0a39e64627def9590d43f0a1db9014f39f2402c86724. 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/BK4DA2463721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc4b8c568014148bf9056777ebfc2d1ce825020a2b0909fff32e326d829d2164. 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/BK4DA2448779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02a7876eb31dda9be54f0e31d807e25e9960ee12a483a4f71fc8f2818f83e606. 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/BK4DA2426764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99849f54c096c1b2f7a68ba93fc4a7200c58aa7755cd5e93560570328c3d1af3. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/BK4DA2463725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3746d2b11a87400d8c1ea86c62f2698c074b5f6767767ca511af502fe4216a93. 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/BK4DA2463723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bc542d7cef3afb6d3f0f07cb462b92dd103758593fa9289380c239a36988c29. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:55:10Z), 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/BK4DA2456113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c1afacf480f23fe1af9b580dc5f72705fc87fd9a5e0966e694fc0393385279a. 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/ES71G2217799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11b02e571e064cfa87a46dde9f1ab1475af988c1bd1dd6d0c05719bb67594736. 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/ES71G2217800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08ffeda75966827961b76927f76d0be72b883670a5a17cf68fb344ee94a325f7. 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/ES71G2217801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2749c6cca4316bb25cb3d80659f27fa6aca341dbfc6fadcf17b333e77e8c200f. 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/ES71G2217802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ce8e6fafb1162cb062f70084a75ea5e734392f5b692676e514d5f40af1924dc. 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/ES71G2217803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x748c570181707601f545174504eee694d68afd9d22fc819ae7cc6283d7e51180. 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/QM6P42358588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c3f856597b4b2e06c228f8484dae56e1c1a88638395dda8963998110f156c68. 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/ES5702201661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf682b5d17192f50f3bd60cece99c93b004adfb3d93a606c676a5c2ce98759b1. 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/GBLFP2341268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xded8572bf47cd6741097954216a3a76c418d2400ce86afa36ab0e65ee6409257. 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/ES5702200676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1266a2073f0881ba33e5f2be84a4d578cc059c69280442c99ad1e42283ab952e. 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/QMBZ91946538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf68b19e40fa90265d198bb8f5413404119f58328ca2203f6cc80c4f76cbc62c7. 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/PT2DY2300278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea02e820737d539588fd73e126ec0c74d8d7a3df1fb74933560fd0233935e9c8. 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/ITB002200232.