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 0xd91aaabca2be2ff307273506b103eaf217880512bbdfbb0b8bf033d5b7eeb2ce. 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/90afd92c-89db-428f-9e02-b3e86618d0d4.json and https://artists.proofprofile.net/proofs/artist/90afd92c-89db-428f-9e02-b3e86618d0d4.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 0xc753bf1848c856af4dd49fa6985a49d2eb714082980178b5a386472eb4f1bbb9. 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/QZDA42598692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x664dcd9554e9d82c4d8ecae8240585b5a11410375af1e6c3a1237fce6f5390f1. 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/QT3EX2488215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x367c1aa102fd565a06e88c5ffb91cfe13f7e28b765d0d0fd71a2cc6f04d29f53. 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/QZZ7K2438181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd9b45cdfd14e874dfa2c6da4247fb8b058cf74dde0885b331b9b8576c76ef04. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZWFN2471142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf625dd7353c2d5bfd00e54316f4ed14b7aee31f3041540c76b831db627936299. 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/QZWFN2407888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb71d12edbeda03548b538d46660937b8c43b2b0e839ed0443e46c7a38ec6226. 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/QZTB72485548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a02e440f1617b4f77865ebc67d1a1deef3ee116da0d2cb48987d30d50dea7ba. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZMEP2432287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8ee152ca52b5fc7dbfed46779902be6c83c95b386c46fbe59b93247132bc1a5. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/QZHN92458280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4692c584fbce7d8522d5134237eb8fcbf882cf5a4cb361f3198d583c25205034. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/QZES62417020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4872be9b9e6d403eb040bf175b64b64768a93c9ac32c645e903dab583666065. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/QZDA52493766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d63b5ace47b8142977778abbfebfb0446daaedebdfb4d6b0ff887eaaace3491. 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/QZFZ42408036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa905be5f2e82b98457f2abc43cab9bb2382dc446d9163ed23eed37fc0e496aa9. 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/QZWFQ2373101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28ca49fa07212232e44226adb343e58a10687306b6a9d7720c542c25307c6240. Chain 2 (Bitcoin): anchored in block 960422 (2026-07-31T15:27:29Z), 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/QZTBF2307725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11c04067f31e5cd1be52a2c90922cac148c14aa03eb6d9a1b141421bff4bc1ea. 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/QZTBC2340115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e73b8f4e00e8af6919139d1ff0f0c753e1b5eee10bc62a5d88625f557f1ec1e. 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/QZTB82326224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb49516a1874ec83b0d30735bbf9a61305d0b9da22e2c2979280a8bc7ec1d0125. 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/QZTB42346926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3420bfbc75a19e48f5177c8c612246627f275bb32695f27f9bbc10fc31df589. 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/QZTAW2328165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcfc13a4b424ad30063c6587a54627fbb20e37c079af5ef2ed4c71f9b406d488. 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/UKZGC2303189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff60b2661efab5b1854a7f5b94928af883c000db62fa75766647b1f4bbc053ea. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/QZHNB2314005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48b52018a2ed68e15f474f950a91171ba190fb7b9832640ca865febf077a5854. 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/QZHN52380907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cbda007e4b81cbc1bdf28408dcf06d1be709d5e78dc3f4d78ce3c7949ba3540. 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/QZES62348312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe21b6b0b41279467e6fe04f762ff9ad0bbff77b11139950087c626e720cbd2d3. 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/QZDA52378127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2534f72b9ab0e3073032133e96291e404fcf15ce116f56522f8441a95ffd16b2. 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/QZTBA2273622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ccdc67fffa29a7ed63c2831ffa44eb0b16729158ddb7082e087fa2af11cb611. 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/QZTAY2289374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb05d7e398af7b4ac7d9c93b94996ef6734aac61570814c75245c27e1e814bf7. 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/QZMEQ2251137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa30175f24a4d49800d1b848defdff567d8af47fcb99e1441071b4ee3c27497b5. 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/GBWUL2216202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a6cacc56053ebd07b52bf8d470371192117a4f0313aa740bb8fcd47613902b7. 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/GBRKQ2220626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ae431cfa69557706bcc8044bd1589629843c74d017139cebc358782da91a0b6. 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/QZTRX2133076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26408a4443170511e0187e1926f01de4ff1d9e863bd572c5168e047e67f91287. 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/GBWUL2120277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd38791ed819501826e61184cac5814fa4ce8498fffb5fc395cab09d061c6e1f4. 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/GBRKQ2159007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde4afd3c82c9af1739c35a0d8615714d830bbd55e1a1efb3580c0a2525fdd15b. 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/GBRKQ2141115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4b61f1785e65556fd68fa7e9dcea21200486b38b07b5e8fd9fc066a2d5fa78c. 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/USLZJ2194059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4507d3160b0b217a66e05af39107d7ba57e814816d91d01ff7eb04fc97f0aaa1. 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/USLZJ2148442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b41fe02e4ed9b74dfbed4511bd63601285fd25aa93d480ed54fa6d079fedc95. 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/SE6TI2041726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8ea9863e193a15b51ae13b0fce3f08bd3208d13377c86374fe92ea88f663989. 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/SE6SA2019386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb40f687124af2c199a88817c2fe4a9c2320f8591703482ab7897c696a7d68292. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/QZHZ42026319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59f488625632868a04bc80448118b18d73e179e3375f41002f58a51992734573. 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/QZGLS2070105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74f31270df1544d32d6704d02733c441c5d0d76a9f228d04c7e51a31e46c27dc. 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/QZGLS2039401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x776956775b5305f75f683c0cd1ee6edaeb725730f2605d91effb434d3c9a266f. 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/QZK6L2553492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x335f08e742059892cc619d705ee0638e03d1ca59f8f7ae3a6ce9fc6295e08efd. 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/QZK6Q2558946.