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 0x7ef804eee8b140ccc610a378e9e27950a694d8cde551dca01dea4ddd5f6df52b. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/507671df-8983-4b35-a5f9-0e829d1f382c.json and https://artists.proofprofile.net/proofs/artist/507671df-8983-4b35-a5f9-0e829d1f382c.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 0x38e5176dfc78dd23559a263535cb39c98d9b0ddb7cdae4b553a9dde0eebfb171. 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/QMANG2208870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd210086672654cf368979c09600ba4bc42d3981f3bc961c1280e4a8acb9d343c. 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/USANG2249100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2f671c67b2e2f089b86afba9244d5b4398a512cbb4279817576eddf19dfab03. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/USANG2225481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x998b6497c6ee10b1b9ca52112a1d9bbaafd0f6f13a6d05864189041cb4b93f97. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USANG2098654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3197977108b52b0cf77d65d92446cfa1b3e58a6176cbb42c72ea27f922b0a546. 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/USANG2098548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x998b6497c6ee10b1b9ca52112a1d9bbaafd0f6f13a6d05864189041cb4b93f97. 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/USANG2098654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb12c34c4ecf6b6007ba9beca4eb6452c2e95cd7f9b3eaa9c32644fdd7b61126d. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/USANG2098669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a4c05496130bb51460d640590f95e8535b32ec2a409c2256349571c99866a4a. 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/USANG2098678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b03af1a1a7441f4959a099417ae9a4b54c09815aae2b8bd9585ff6149a60e24. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/USANG2098719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ae89d863e9dc112f78c8e99a72f1777cc870f7380c062a371be9616945fd37c. 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/USANG2098802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a10f79e8ca4844c14221f495cba5426bf04fec269af080ab02549fd51c676b0. 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/USANG2098839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe5dd8045e7cf533613b1b047a2a40ce9a935a3d0f01a2aaa5419d6be077f6ce. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/USANG2098908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8bc3114483634d9977cee0c17bedbd3b441b6933d5eafa9ef496417ec11d891. 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/USANG2098914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ea54f8d7220f74d107515fce4dc3458d44573ec5652932ad3d91babf7c24afa. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/USANG2098927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32708ca48af0580fc4450184b5f56654f3a333d47d3153ff3c126a6343dbafde. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/USANG2098942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b336cdef94214ecc6f14a4d60e519b697a2fa7a86cc0a8c976f9dfbd0f1cf94. 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/USANG2098949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67fd8597772993627278a5c63307ae2838b6dafdec825b8ac5faf0903326adf7. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/USANG2098952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5688acfbaa04e7de9622603ec2d4924461a9a2d514b9b3a97068ba8377559de4. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/USANG2098955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3a9b8254117a260f7b0784236a675b9a13c9332ed7175ede655df1d866c8bc7. 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/USANG2099000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ee006ad695f91e33b1f4bd2b6a44712931c4b25eedc7a089898b1a1510f9be9. 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/USANG2099006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f2915c89c2361b89cb311f2cbd37bd0e00efbb60f48a384cae0255d23ce5a4c. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/USANG2099012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fc26d68855092a9b459932538802b16008436a9cca244db49f5f68c0aae891e. 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/USANG2099562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e30293dddbc7d9518fb7ad3240aa7b2f7fcf91303785a1541630f525fef11e2. 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/USANG2099601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa29740761560745a37ac49d4e852fae4b1c231f4ff5181a7b36b885d889e4e65. 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/USANG2099610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09942322b6e3486a8ba55218f799f300a7c5a20e80d2663a81d3461dc358865d. 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/USANG2099611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccb30ba302ace46229f54ab6d1e1e608b4c2f6f7ea29860e12384cb2e3b1260f. 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/USANG2099613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb9585fa624c9afa5e9eeb8a9d34e0c19fff63f8c7cb1c24c403f149271ce73f. 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/USANG2010042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2179400512f008081511e45d7461fe4519d0da73621ff3073707958ea0954688. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/USANG2011164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3db6ec9209281aad82bda5356b069be12261947c19732839b5936104ef36eb7c. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/USANG2011173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e162c620bbeb52741b897f3ab5ab51945acb9421688bce3d3dbdd9625da84f1. 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/USANG2011202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc079d628c38c991df0c064f4401a14204e2149d3d9feb6bb11c763a1aeb7315a. 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/USANG2011284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f6c2e3c63551a0db77b66d30b7f232f3f81cf854d6a4507a643846dbe578b7b. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/USANG2011289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf51a0077e7b4a1f4ba3e8ce16591e6306176d54ba14d8064cea864f2d5559d19. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/USANG2225468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8daa0394bb6e17ba6b66a646d603d373ee1d133d93f5ad154dacc8d2ecf0fffa. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/USANG2225471.