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 0xb8e6993dc199c4f8737109b7b902ddc81191fac2dd738070913ed0248956e54f. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/871e13ef-4ac1-4f8d-8b21-98314c92b876.json and https://artists.proofprofile.net/proofs/artist/871e13ef-4ac1-4f8d-8b21-98314c92b876.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 0xc4ef86b31268e3d44405deb500328962d7b44b27ae09c73314d09bfb1d5616b9. 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/QZTLA2279792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c45926769a71904ec514140095ad2a256bfc4293cea5b08486d3c34088b653f. 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/QZNJY2170762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a502f1a3ca65d8a68597437157168ce7e31f5a5a5c2d39df3790a857ed765b0. 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/QZNJY2170763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2480ed4785363e93b8efb66530db7a67633b2cf4e01ab8cb432e3a87d8ae6fe7. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/QZNJY2170764.
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 0xf6e590a4ff0a127d87a3ac34aa584dc2370aa6adda0a9450c481fc8d59446d00. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/COA6W1700219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf907d9375f9b03ebd270ef47afb8d2ba3756843795cc2f31d5718bb9e451af23. 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/ESA011840558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c0d0ec3d4f974f56f138c0e4cdefc96ea05be63ef1752dff7aaa2eb6a1871db. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/ESA011840559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4e8ed08b09488a9174944d23705db16e4b19d35013840bc107966ecc89af75f. Chain 2 (Bitcoin): anchored in block 960487 (2026-08-01T00:15:43Z), 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/ESA011840561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2062a87dba9ee89c8c4a9a356ba752ea3ab0880e9c8f2cbb074b0d8e2944ecba. 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/QZMZ92494394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe033530935db1b9144a1f29eb6c02ce6f304159d3c7d7cada7ad85f5770dccaa. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZMZ92459934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79ffe641821816f5c96f5cf19bd034a704f41b4bb60bac6b3606dc73e56217da. 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/QM4TW2475564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16c4eb20cd4a65fda5acde606c01bc460715e6a7426a18b547060fee0afbcdfb. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QMFMG2349369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1922f353c69e0241d4494fc5356e88f565cdb6bb10738b3f6530a9212d89c17. 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/QMBZ92337735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4496ad03fcdbb38b340fe80517213fa0db45cac609283875c0c483cf0ce15f0. 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/QZ5FN2375715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0aba8cf47ef378c202c0bcfa9fda789e64cc4853637f8bc9b038fd0fe328d6d. 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/AUMEV2326546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe896424a4ae896bb4275b6ef0a356f69ce1e3881943f65eac6265961b4a43283. 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/QZ5FN2331983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x870f566d4fef822d2f741f84f6ee3543adfa78b30d8ce50d6503ec326fb2e88e. 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/QM6MZ2276474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2953e66c797ab358f0f8042b21d06010056dc8615d5dc087d6dfc306524fbcad. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QZNWX2088824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0243c8bec01b8435530bdd712aa6593ffa810a5e00ed462be84cb830916aeb8a. 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/QZNWR2004917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ac055b6810713e8e4a4b6da6f93f9fe9904eb4074be6e00296ce924cc22642a. 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/QZMER2055473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f11541e2aff5cfe9e329ae4fbc4d7dabccb84f7cf112ef2b0e66e1e2ce1fd75. 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/QZMEQ2029769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd697d8e2c454fbda1be2863d23ffc053c6b56e0d66698df6208ccd04e6afe0e5. 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/QZMZ92015595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6725651ffb6dc98fb5c8adaf105d279a58582d5090af5047c85ac249ab7a1798. 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/QZHZ32091650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d2b6bfc6d203091adb5ee14e9d058f13436851a21473dd4ce09a16a0fc95a91. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/QZHZ32019934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x355fda5e572bf7391d3483209b8d3646289c5153534c95236a7382f466e8dd74. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/COA6W1800987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ef3703eb66c8af404660823987065ecedf51e372613284376d525e598cc8038. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/COA6W1800890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d6b55ef1262bda1e73a511762487ec09fb989be0fb8af1ca346a860a7d5dc4b. 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/COA6W1700307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x854e6b3080503c229e8f4c1767c279935c67b9fddf1dd8a1983a08de78df34c1. 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/FRX452491673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6735d0f16ab3b8e94cdf65047bc9d93164242d08d159d19bcc5fe6a2ac01cd5c. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZW9N2226332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe051008602b354d3ee439d7ecfdf61080dda15f21e5d5523121f7c7f8c067c55. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USJE61906000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e750d40715c536ba9e48d2dfd121daacfc052096940208b1676a0ae0f7c0a48. 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/AUMEV2334147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97bd8524f190a4fbc2d5f2d428a926ad0d729ca20bb38367b222cc64de1d4a15. 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/TCACI1526898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf6672108d2554e68a37c0a96285826261a8510aadc8c3ab443e5cff7716f9d9. 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/QZHZ42276155.