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 0x0e86f95723ed8012a79197b501338b98b7a7f1c4e01733de367bf0c935bb5a6f. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2404f7a2-39dd-42e7-a339-aebd076b550f.json and https://artists.proofprofile.net/proofs/artist/2404f7a2-39dd-42e7-a339-aebd076b550f.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 0x77b4df2ec627927eef6132fae299caba2735a24b2d5e97a3adeb7132cf5d412d. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/GX53U2427289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4c851a38ecaf7e0ae7c17704d4ecc612d3c09d78ed485f5dd7060aa3be20fd9. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:26:22Z), 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/GX53U2427314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8611b2d0d5291d492c2ded10996cb76180307d1906553a762c24057f42ca9f29. 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/GX53U2429454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfef654d295d96569598dc17d6e18976d5a496ec08ab48813c47ad3c30ba58cbe. 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/GX53U2449973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd742282789141e56334649e60e7a36fa1c0013d8a98eceac63d6b82e903120d. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/GX53U2449974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x140dc228c2b22d01388c3f9402d89d887c9f54f8d4992ca63d6f6957e714b0c3. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:10:25Z), 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/GX53U2449975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf712db8ffc328459c8ae84b2e0f47fcf6961dab5b1a8af85eb1daae218c4fd86. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/GX53U2449976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4454118fd6713d18541dc8760da28d2c3481024cf647ae0e00367f650051ebae. 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/GX53U2449977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b744c12253d4c91e5488042cfcc8d5f724bdbc9ae0907ade3dd021ac34c10e6. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:07:32Z), 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/GX53U2448314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39b485a9e53132d2f4051ae9bb74e698bd5f47fa493e0271593dfc95b91d97bc. 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/GX53U2448315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8f1162e17f450d47339e403c73e3aef6e97455f1e22f497f5d3396df40392ad. 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/GX53U2448316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40993e327a234e4dbf7a0f29ff81e6b757eb0ffc7971641942b2932f382ac7a2. 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/GX53U2448317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7760d5bac31a43896feecdfe7723c3d2a98da059053bb50a2a0c5fbf22727236. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:54:26Z), 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/GX53U2448318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9899fa7417fa17a1dbc82892a6082faa128d8082efa53fc9ff9546e033bdf8b9. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T19:39:06Z), 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/GX53U2448319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd65887631c27a227f1940a4792c0f0786e27aa46d06c5e4e9d3f941b96e4aac. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:21:45Z), 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/GX53U2453557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef8908075ad19398d250303049e140eafde03ed0b23cff81c5426196ec94d7a8. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/GX53U2453558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11b20aadcbde407096a99bc29cc53aca115f18f3a80e2d5c0fcffdc9136d299b. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/GX53U2453559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x895213605eca09bbdd3f7b93e97c8367acc318128ac0f08630428e234c0651ce. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/GX53U2453560.