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 0x45a06b66ded1926fe0db2282da1cb4113b14895a03404676473c8acedd127ae2. 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/df4d061b-6491-491b-a1f0-778fef1a8895.json and https://artists.proofprofile.net/proofs/artist/df4d061b-6491-491b-a1f0-778fef1a8895.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 0x91e7d4c42b838cc54e911c3953593ecc8607e50aa32c17cdfc73126e9ea9c91c. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/RUA1D2267900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0468a7a94da765cf8cd53c363f796c28461142491b5092934d142320c4442e3b. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T10:48:09Z), 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/RUA1D2303440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x286e314f14bc05fe4c47b462e3753bc1a0f54d47d422c712f96ed4a6bdfbfc84. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/RUA1D2386703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d1372e57216e520885554838fd3554437484063596c335456f61150f2963838. 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/RUAGT2333265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1675ae1cf84e8cc8da0a8ba2f46826b4c9b13836bd36d85cb7dd3345a7a2619d. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:48:26Z), 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/RUAGT2362767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdd74d505af20ed69b0ff9af0b9a244560676f1121f778e19ef9aa91d70cbd2c. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/AEA2Z2460098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x249d3c148db2ca96ed82535d92df1a6942695c597f0bd11d8fb2b62c303ff124. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/AEA2Z2465197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb31c094d8c9d63a202cfd8816bee0b9a06509e6fdba203eec93aad3e1d398e3. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/AEA2Z2469605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dfb8481d9886824d8f6045e57ccc664d01df235606cd91200d169d772a45a73. Chain 2 (Bitcoin): anchored in block 958529 (2026-07-18T09:21:41Z), 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/QZW9L2461963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25de4789ebe225e1974a9598727a78d41f487778c4641b120f65c1b10eb0bba4. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZW9L2487808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4332457fab13826a4b3acc13eba1150bd49761b7b52bb3fc9b8b34902b28b467. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/RUA1D2506470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0ad740ee935c0982707ed8eb8b8ac08dfb58b2f7e449752808913771c0e8a28. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/RUA1D2588682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42dbf832fb077ae1457e6bb66895e33c267136b3a44c688f7edc0953fa1e44c2. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/RUAGT2505477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf183ff59c718392157e00f58a5b3760847a2ad74bc96f11483c44b7e0170c522. 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/RUAGT2514144.