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 0x7815263b665f1ba5c54d7d819205e3ba55131b77d7310b99f2a35815980552a9. 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/dd354acb-03e8-4c70-a23f-4b63aead6405.json and https://artists.proofprofile.net/proofs/artist/dd354acb-03e8-4c70-a23f-4b63aead6405.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 0x80c38d916c5a4a938436b700ba95206758a7b20efe2549375625539a25dfe45d. 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/US7VG1812442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32c69c9657b5ed6f6cbcdf4fae0dfb3670d314706b8f5d15469e51bd80ee4fa8. 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/QZGLS1902796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6e3462e1cf65ea19760440552f3cf3d03a5e94505a0e3690594fec907b91f8b. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZHZ51943113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5883324eeae0c1e039007ca8e7cf348f5183b277fde8825799bd9024e95efb2. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T15:47:34Z), 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/BXAIX2100020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eb5c72daac86a7cbd4e6b5fe0912f7c3202e11cd94c1a37f8b7152231e2000f. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/BXAIX2100041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x241e38dd6fea00236928bb2c1d5121e2ec551f14f7c81353b2784ab51e20b720. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T17:39:47Z), 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/BXAIX2100052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc9648eb3974272bb2e3eec9d95c899ed209f24e65b7395ff5f8fcbd4e74fd4e. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/BXAIX2200103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x774868976c7ef4da7f9b2954be811ca9ecfa94b413125faf69e2bd6ae0c1a198. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:42:56Z), 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/BXAIX2300242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x095a637a6f8872f759ea21155cfbd74e2c0ab6d752b0b35d0defa3b5bfb9d9df. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T12:23:32Z), 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/BXKG22400414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a42d83b2359655088b7cfb72e1e88f682f7655a0d7b95793457f053227db6bb. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/BC9CC2400914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61e963789a40ef8dafd3766a4b01ea3d52445a7e7e990993986b107155c49fba. 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/BC9CC2400922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2312163a20c3f659b3f2325edde377db914301033f06e8e7466d80caeeff8e2c. 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/BC9CC2501045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4585abea106d471f7f1ce9f6343093bdb415e8d45a8e93017b28391b7a21f91. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/BC9CC2501067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd53c3d7704b1f7020b3739400edfab503bd293f49c9f019db4513580c065fa69. 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/BC9CC2500969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x828a7aca557c4874a0e3a0446c25aedc49c43fb5156788c9b0c7a1da96172ea6. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BC9CC2400940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaba5dfe40c678520f972d3fa3e4b9e769930a9bdff3fba665580a99f236b13a. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/BXKG22400343.
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 0x90ca1aec28d9a0cfc75d36a132accbba3873065e9d6bd091ed08fd99584186c8. 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/BC9CC2500965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86bd679c2a21c53bf377e0e46c78927c2c2c5da013b6a9889bd79a09414a8166. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/BC9CC2400939.