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 0x7572241de7ddfad0c6236932f6debced412d24b42e1db71b2f51f89b4e7b3821. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5372a77e-c658-4b3b-8d47-3a84be844146.json and https://artists.proofprofile.net/proofs/artist/5372a77e-c658-4b3b-8d47-3a84be844146.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 0xe1e9e9c4e2b3441ca5e03bb61e2f81d8f83ee5bd25c58c07bed5da59b7f816c0. 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/QZZ7K2413135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x910123e15507f0ff295467a167c46c55d92f7418fd634c6b155b65728c7bc049. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZZ7L2402280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x910123e15507f0ff295467a167c46c55d92f7418fd634c6b155b65728c7bc049. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZZ7L2402280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x041498728583672168a6d782885d6e844c02f75de19a04ad0c3a3a0dc22dfc30. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZZ7P2457663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde4cd3c17a09108beb266d57ab0d592c52caa4ef8d58f9debd63a2158b390630. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZZ7S2437999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10790eb9c61c9ac5d9c45d76451cb6a14f29c42a472cea39d942a8ecc0a8f729. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZZ7U2478527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b02c8fc6bebb6b24eecf4a05c24270ca80c151cc4400beff9252da870257204. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZZ7W2492648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8a291f33f07ee90890e4f59fec91342008724386cc824d288dbb365bfbcd068. 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/QZZ7X2416887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3a07daacf9a34b0a6cf8698b72f9734d73c9a2ad9b29d6ccd2326ace62896c6. 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/QT3EY2480636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2648291c54b880de0fa21dd9a011f96e816e4cc488ede5b33a3bbfa68fcef153. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZDA82509646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9de6a0b5ecf24f51a0d86d89fae53a4f26c3ce363ec5625757c173a9928cb9b1. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZK6G2595751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f2012c1aafbf85581263a179955057018ad2bbf1afbd9caa2903405b7eac43e. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/QZNWS2516773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f9c51860adb8f3725cd3f5cafe98181efe1cb16f8315a02eed0f97caa00603d. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QZRP42551417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ab577b30dd79d3ba8c976deaaf9ae36de413e10b0ece7f590fa7dc149e34440. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZTBA2587638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x019bfa151b26273be7bb015040da84c58d5f096b76f2266a94488b76721710ea. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:30:31Z), 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/QZWFU2546490.