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 0xcaefa991d038432be35aa9c2113b96a6bf7c07bcf02cf232a553e2eb175cc187. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9336724d-0451-470e-a620-fde2e80b2d89.json and https://artists.proofprofile.net/proofs/artist/9336724d-0451-470e-a620-fde2e80b2d89.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 0x197e8a3164458d756234f71d8d65493ec6e624f156db00bccce459dba841fade. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/TCAHE2342532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ba66d6a77198cb2890c5906116f107a1ceacce701f6f2aa8f31603abf70c7b6. 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/TCAHE2342608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc1361383e2c78083d8d6c471bd233eee85d77248b652e7653a4e52abdae7e2d. 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/TCAHE2342616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd873ad1fabc63456ef8360d25a1410e28eab39511da6dd8907a699c922e899df. Chain 2 (Bitcoin): anchored in block 960225 (2026-07-30T08:04:30Z), 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/TCAHE2342500.
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 0x9c73ae3d9aad7de04852cda0e549e1ea75053035cd9276ee53c0aecd039c4fb9. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/TCAHE2342547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bcf21be1b6f04444165444d4a29ab417855e5c638f10db6026703c03ae7a889. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/TCAHE2342565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xede561f7ebb3f33e9fb485bb4904070583a5a3e43a3463ac2ccbefd56729eca1. 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/TCAHE2342582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x621e600a2f5148d14553adfeaf5e01aa4c4cd258bf90c5f7304a2948a19f6648. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/TCAHE2342595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d7ff56cb239d5724b1cdaf3b4e5a73863eebfc7f7d3dcfc32464a3492468cd5. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/TCAHE2342625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x238896334d12dbd290f6c96e4dd3bbe0377b2bcd23681adca97868ed26288366. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/TCAHE2342640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf0051191574d000904a0d70ba70512309a23121a4a5c9f43472afbea3973ad9. 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/TCAHE2342651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1173ee88e82995cb0059270f6fd4f81c60cf7d0b5754b43d9eb423af4c24c4bd. 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/TCAFH2067290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a6fdb153b3f1b2c8ff14e823d77dc6570154c7dfbb6a1e30a506fbc5bce47e0. 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/TCAFH2067255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf758ca07c6522aa65f13b4f5eba7cc707a64df2dbfee0d2443626cf98c671c0. 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/TCAFH2067342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb348709fa8ffbf2fe608a18f0765a22a9633d38b8f82884a79b769c79ce0fdd7. 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/TCAFH2067358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2af4d42ff96baab921eea125c42946908d95a26fc268e2ae20e75b2ad1c459ec. 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/TCAFH2067392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ba227ee0196483b244841abf3fc0bbae00d80d6b5e5adab12e7e3342614995f. 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/TCAFH2067417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa823088c7cd710f83b909ae4976edd5cb2290af5c8e34f009cdff538a31d727. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TCAFH2067446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d7f79eb5e2235689975db94e4ac32cb5a80b18d011cfa370e7581b1fc170688. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/TCAFH2067219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe46a44dc40ea7852c8bab20a8e7a87cd1c47d1b19c500a538aaec67c0df392e7. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/TCAFH2067305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c5230a1e23e92e86c039366cbd19df23ad838757221f259264105fcd4b27d28. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/TCAHS2346281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3b7a6101357236a62b5354a29dad2fe32c69bcc61589541297184cdf3662633. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TCAGR2233173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d8a02630e23c6f8623689c75edb328b8dc219d53f316ad07619d7dfb9dd50a9. 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/TCAFC2085236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b5e2a0933ece5abf62e5dfcc3823fcd5033dee66084d4e34411e2d46a7aff1d. 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/QZWFN2305761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a0897533aa558d3ff199612042dede30e47dc3906df97e89c77a7fd8563bf55. 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/QZWFN2305762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23b75a13f8999a1aa79da45a2e7fc291461fb79ae0e539537c406a18fa986b68. 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/QZWFN2305763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd95fa7ed125ab0e4a45575cedb324d6699e9b1def580d3d7f99ba33c8852ebd. 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/QZWFN2305764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6372b5d2fb14eb2316cc975537d543fb660e68e7bcf411974165c79825ede1c. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/QZWFN2305765.