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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd210086672654cf368979c09600ba4bc42d3981f3bc961c1280e4a8acb9d343c. 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/USANG2249100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3197977108b52b0cf77d65d92446cfa1b3e58a6176cbb42c72ea27f922b0a546. 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/USANG2098548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a4c05496130bb51460d640590f95e8535b32ec2a409c2256349571c99866a4a. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USANG2098678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ae89d863e9dc112f78c8e99a72f1777cc870f7380c062a371be9616945fd37c. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/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 0xa8bc3114483634d9977cee0c17bedbd3b441b6933d5eafa9ef496417ec11d891. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USANG2098914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b336cdef94214ecc6f14a4d60e519b697a2fa7a86cc0a8c976f9dfbd0f1cf94. 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/USANG2098949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3a9b8254117a260f7b0784236a675b9a13c9332ed7175ede655df1d866c8bc7. 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/USANG2099000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ee006ad695f91e33b1f4bd2b6a44712931c4b25eedc7a089898b1a1510f9be9. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USANG2099006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fc26d68855092a9b459932538802b16008436a9cca244db49f5f68c0aae891e. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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 957145 (2026-07-08T08:56:20Z), 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 957124 (2026-07-08T03:53:27Z), 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/USANG2099610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccb30ba302ace46229f54ab6d1e1e608b4c2f6f7ea29860e12384cb2e3b1260f. 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/USANG2099613.
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 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.