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 0xe71d03da71be5095be91574f1ebda7cb552ae476f7794a777a3605b2e76e0451. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6aa84493-a151-4ccf-943a-255dd72ea283.json and https://artists.proofprofile.net/proofs/artist/6aa84493-a151-4ccf-943a-255dd72ea283.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 0x43c4b44512a4406c92ed791615c103de938920b0737d27c9bee164589b67517f. 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/FIAVX2000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d6f30f32e248c8d7712c0cf208c5a8769c391d3571c53e671f2c3833c231a38. 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/FIAVX2000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd94566df97b3631520885b47ccad5c91a6eb365fde70cf334b1dd20960dc9bc0. 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/FIAVX2000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84c7eadd5733dc6f7813d48baa5c98c280ae5739e48fb8bf3d35688c10ef0a9c. 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/FIAVX2000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bad004428533ac1b1ef58de58330ee935c621fa186344d0c4886dc80e312747. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/FIAVX2000006.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1455ab9a74c956114bb5d116067699a31656a35f6f7d7d02e47833cb0f8b494. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/FIAVX2000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb415dfd05f1d0343f961d88f45a7bd4bfd2f6133c56822f0a838bcdc574e94e7. Chain 2 (Bitcoin): anchored in block 960349 (2026-07-31T05:23:41Z), 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/FIAVX2000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf669e541dd99d36014af1aef7dac1982dbc653741cfe0e355d4aabcf9802f64e. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/FIAVX2000009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0ec2ac852118b19e6339c5c066568a33794eaf3ade5d249f164c8485ba55339. 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/FILL72000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d542e55b5466702e4ee8491d6a6977987dfdd51d6e9beeaa98446af5a3db715. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FILL72000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5890144f82202f63bc44283f071bf716e0d3c63b9e548dc645c1f2b04f63921a. 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/FILL72000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d435bfcb9ddfd66296b86b45ab0b2b37d8673da7c18a22fdde17d6b9b43c6fd. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FILL72000009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e0e71122a6dd4a4da12a41798b8ae86bd438214f725df7ea60c55f9f022dfea. 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/FILL72000010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66114ae2251532e23127d7701105fc9527e215f488ef8a49c6696de432891420. 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/FILL72200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x261ecb48af953369b20a2a945391bfe465da40a44f337f4e454c0fce4d7904f6. 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/FILL72200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbb8c68114f10161797b012853aa01d032d6d61adda991336eeda34beada650b. 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/FILL72200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5665a08df2109caece2f785d5073523fddcd16346b746a94a9f3f56c164de77. 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/FILL72200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40160cb2aef6ae1f3b9eae291a34b5f2dff49fdd4c970178878ed61c9e9ae621. 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/FILL72200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee00a57dc5f914a65416b35e28f73c07bed54cbee85c9d6cc3d86c94f0b8da54. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/FILL72200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1897a49c93842f88b75ffd2ef1a86caa58d43898f993e47689b5ab2078548d22. 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/FILL72100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cfcbc887169b3e38fbd8e999a129b46ae18460f75dd170c759378ef0094c89d. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/FILL72100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fb3415e39de22eb4bb88a9ab3b4f321c97b12254fad31d112f7079ead69aed7. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/FILL72100004.