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 0x28d816f469905876d88ac956faa5e20c366967f71cb29e464e4430bf85dc4f4a. 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/abff8077-b3bd-4fb6-ae2a-3c9300df6aea.json and https://artists.proofprofile.net/proofs/artist/abff8077-b3bd-4fb6-ae2a-3c9300df6aea.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 0xe07430fa9177a7945d3f98573c39955c4bb3bfa2e7836233652b7a28fb0deeb2. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZWFM2336715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0282e64a3b9e06b2be83d28b85303df42b41f238184ee31bf6a965d4e63ce563. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T12:42:16Z), 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/QZFZ62479947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccad17f329c61ba5efbf32a2b3199373e0d4ca1cee6c75272fe81de4cd96e006. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZHN72459362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe07430fa9177a7945d3f98573c39955c4bb3bfa2e7836233652b7a28fb0deeb2. 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/QZWFM2336715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x038754a98ebcec6127cf23e60d9ac82b9f9726252437c43694e22acfc3a1172b. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T04:55:28Z), 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/QZHN62401329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe07430fa9177a7945d3f98573c39955c4bb3bfa2e7836233652b7a28fb0deeb2. 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/QZWFM2336715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1af189aae373a0070341fabbcfa05b8569fa68e5c5f7b7ecc7e5de3d719a672e. 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/QZZ4J2400436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e7e426fc9677c0433a37f6f8908902bb3ec9e78af8c2d67c08b0bdb11317b8e. 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/QZZ4J2400473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64664b6737b7a71faa45d5736c8de524fcd790681659f29a08c939227900444c. Chain 2 (Bitcoin): anchored in block 958625 (2026-07-18T23:11:57Z), 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/QZZ4J2400454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64664b6737b7a71faa45d5736c8de524fcd790681659f29a08c939227900444c. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T19:52:18Z), 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/QZZ4J2400454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa837bd820e15325e4ad5755f10bcc4d393fe5ec37be1c9e1c9a836ef14a85091. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/QZZ4J2400520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8c3537145c567fa339cbc57da9f7c797dd0f8b4d8c9a7d72d28a9fe2cc3360f. Chain 2 (Bitcoin): anchored in block 958587 (2026-07-18T17:06:26Z), 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/QZZ4J2400523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46b91562721efbf9317c72b8e7f6dc2626a94c654fb92b4a028cb3186c4667be. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZZ4J2400519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29a7d6a5169b162077d46b5dbd88a84ab3d576d89489d0c60c88f9041e1f1f35. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZZ4J2400521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a40148995d00f331d39e23a65ff035bcb215baf90654e41a6f2da4a69e39e5f. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QZZ4J2400522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9985957b14671ac3ce032db98dc1f8c7b7fce8da15faaa28a2b88eb2bc7992f8. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZZ4J2400524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0665be85dc0169d3b379deaa1c285ce3ab011d936c8ec101b831ee33ae801ca1. 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/QZZ4J2400539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f502930282f463c2d1eed14a071b14b93b7d5b5b0d6bf6ba109c5ccdbec9197. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T10:06:07Z), 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/QZZ4J2400514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18e05b4fda31218e2b4e2d0de4f5cccc000a58f565f200ccbb2bd30e8493b103. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZZ4J2400538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42604408ef7497cd9d699458356d0d24c9a560e9209e1f6926457ec83963b503. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/QZZ4J2400540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb6b8d06afd1e5fb5ffff54bf2f950447f466e1f78343b19ec5fba0c568e57e9. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/QZZ4J2400541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabc66c68763884681b5e66ff0ea35255e0f166349324b718a324fc3f9af9e8c5. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/QZZ4J2400542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7969030b0d1ef79c185d2a3e6ea92b586e22e675a8b8d8d4b3c3c4019ac956fd. 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/QZZ4J2400543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64664b6737b7a71faa45d5736c8de524fcd790681659f29a08c939227900444c. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZZ4J2400454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b250d3c9fe3898fc09d34be86fce8a635a2a9dbb7e5327e58ce535234066540. 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/QT3FA2525466.