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 0x806ca8dced4c9af47fab151755bf2933cc63f706e37b70e8724394505d4ce2a3. 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/6b1ca744-b94f-4fb6-8f99-d6c4493d0497.json and https://artists.proofprofile.net/proofs/artist/6b1ca744-b94f-4fb6-8f99-d6c4493d0497.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 0x4fcb399088f8381944846781fee556f6b7d6532333adef3af67cb0536e463e52. 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/SE5Q51821651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb84e275a67ed64bc6e42c02490c3e80b9c9fee462fd9284bc046c8bed78586ea. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:41:52Z), 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/SE5Q51815075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf77b4ed1e9e4a3f48650a651a7b53be0867d9fe62f0797e31297e5b51d9c0597. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/SE5Q52002954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76f5c05836fa00215e3c60b5dd4346900ef7bb733263fa93292e628cf3f620f1. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/SE5Q52003274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6861cc3dc42da76d95704d56069d8201bd70cb2114f11d29bb851db735969e90. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/SE5Q52003367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71aa717531c7b3b42f038131c492436399f56514db3684f984ffdb1c30edcb46. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T06:29:41Z), 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/SE5Q52100128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7adc8b2b0c26eb6b134a3e4b13f6f87d3908299b1f1b130c024116285094a857. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/SE5Q52004106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d0bb1803ced2d2691949b00b3b61b0f871abde9b4fb90c3076d3418e406e68e. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/SE5Q52003532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f88c235526d775430bd2324e5a49c5a325ba721b4d84fa25e9377faf17b11c3. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T18:00:43Z), 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/SE5Q52003861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c7580c1d89541f5bf1320057ef1c32c39650241835e3468ef14799ff4d6596f. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T16:03:40Z), 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/SE5Q52102318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbedb936ec3ab370a6c9f5a117a2322445d56399437eee30450917433e22f9189. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T11:06:28Z), 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/SE5Q52102878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbffe15220fbf763bcaf7326b51aea44089442e1b3a4ac1ea0c698172703b6d19. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/SE5Q52200225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x259241ede8d95105b73b5b5bb2a3126ecbc061136079501ffa935d579d810f5f. 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/SE5Q52201073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaee68fa910ebe0965977d3772bb7eab934b0018621d33615848cb1e7f8d0f0a. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/SE5Q52201047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6492d0e60f0ef267a779de885a8342a2e382cc23dcb761b26c689b96fc2ab5d. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/SE5Q52203202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f13bd160fe218c8233ceba2552146eed9096e01e4efe7866c4a2247c07ab622. 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/SE5Q52300989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ab42efcce3836cb8077be66fcca2efdbf088d8b6514950c7b987a0b5209f940. 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/SE5Q52301191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd26d7da813e48468ce7c9061b98199724a402a97602ae8aaaa27e0a9b83361b2. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/SE5Q52301829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77c44df88545f5a7c0c9439fd5d8385cb3a2d1b1b9900737de7fc8b147a3c320. 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/SE5Q52302466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4a4e4aaf0659b1dcf09f27e6112dd0de83563366ee9158dd79803f755c93802. 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/SE5Q52302468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0c0d165838049b51d06d42ce588c2e4cea52147d7f0204369673022eb02a050. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/SE5Q52303397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5691bdd17c16ffdec2d3626a42db135ccdb566345742e9eb6cc38257c15c513f. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/SE5Q52401909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf95cd8301d8dd4e7ccd6eea2901e4181b87924a631545f06b7945f6c400ac8b7. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/SE5Q52401908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb010aa015686b946dcde3f43c4f461f16694b96ea64aaf6ccaa97fc78bac64f8. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/SE5Q52403833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc69ae3fb8188b6cd65d91cb3171a245afd71727ce01958911397e5a1143f7161. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T01:53:16Z), 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/SE5Q52403836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc64c613141901e435f452d524c80c99238d1c6c9ee6ccf591f652920b89eca88. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/SE5Q52403837.