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 0x75a68e5b479e8ca66c95a2d5a35ce3a46d4983332173546c5fa5fd6266cbeb9a. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a0d582ab-3ede-49df-8374-c5c3f9e2b4af.json and https://artists.proofprofile.net/proofs/artist/a0d582ab-3ede-49df-8374-c5c3f9e2b4af.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 0x4fc18ec50e137ba8ce90f50f912892fe67176f5e3b619ccd47a47949b6925a29. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/FR9W12001468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fcdfe4281d364e31ac72d393cd5518b2fd55258fef1a5cf6a74c165e7b7e511. 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/FR9W12001465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x677db269df3da38e6ec29ffef9ed2912b93c570a52c59f15e00dd367c21c8be4. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/FR9W12001464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4331aa865fb6fc82aac73e4740e0e2f325e36757777139f7efa16b408c882d73. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/FR9W12001466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x617a55215dc8793648555c7cdc5fc4cc3f47acbd28e5e9cf076816b987f0bd7b. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:18:06Z), 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/FR9W12001467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6288939e6fd598d6f74220c171c7a908493ac738b31c896f56334373cb1ec01b. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:04:34Z), 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/FR9W12001469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0e54a54dad797571c9a78beb1a45c2853bff011142606b01503151260bcf891. 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/FR9W12001470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x785dec828550c50ee6bb39aed3fda28804768bb2daf01e8df0c57e6d5785cbe1. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/FR9W12001471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2e9b00b6d5a15a872005e6d80f095e9db9e94dba3bcfd571ea88977ee8dcf6c. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/FR9W12249082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fcb049a5e65f9a4ded1b06deeec6cbcb4538004c45227aa604878c8d66cd8c0. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/FR9W12353636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa612b8b93d900cfcc57e5682ad0f3baaf4bd75ecd8d783f96703940ab8777863. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/FR9W12249081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13c882b51c9d7fa4dce2c5af365f5de90056306b3ccccebf3a9a77055c893e9e. Chain 2 (Bitcoin): anchored in block 958422 (2026-07-17T13:35:31Z), 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/FR9W12518954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13c882b51c9d7fa4dce2c5af365f5de90056306b3ccccebf3a9a77055c893e9e. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/FR9W12518954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb52bc3aa32f30a46cf0cc2e75e2658121f154cb82a93bd9b6996db3e6fd72e45. 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/FR9W12518956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a1d12b91215a206a9a4ec13963ea320743470429e7a55e068ff6c001e4ba42f. 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/FR9W12518955.