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 0x7a89255e4756f189069b94f3bb145531e51f748b450614228170f131502872b6. 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/39d2ecf1-ff03-4893-823b-a4c963aecf89.json and https://artists.proofprofile.net/proofs/artist/39d2ecf1-ff03-4893-823b-a4c963aecf89.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 0x9a1d5782f31325731256b4862e15348503532ea2b7cfd4671fabd0c37f2a8c12. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/GBSMU5550807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77cf89a170edaa6a3651de30ed265bfcb24e35cd8bc27934d7be4985d8276ecc. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/QM42K1990634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7f40481a2c999ef4aa296545be6a9b1b708a22690e3168f9beb161a205d5e57. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/USA2P2024692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e71797c3490c70360bb2e3e697de58a25286a921e1d32aab963b3aa47b9c607. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/USA2P2038313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33fad0ce4c77a69d994e20935732e4101d176d1c26c7427a4a7b360db3961f1c. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T05:03:21Z), 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/QZS672122082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a46ebacef282bc78a8547f630bc6371caf0593e00f0d16acec8abf66c76ef73. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:34:11Z), 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/QZS652150264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc766ff8d060b34b2b2c2e2db74cbfeefb5999dd6c3fcb68739dcad697087ae9. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T13:00:18Z), 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/USA2P2137082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55ef602c84e54d9119ac5f94ba836afc24285b76e529e03d5186f46c7627516a. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/QM42K2211423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48fda42e35f36974e6f10c44df819626a779c672fdfa221ae29761fe6afd0c51. 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/QZS672243282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b9a67f49d2fa74eab553f01c8688e956d900f0217c196a928739bfcadb3110c. 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/QZS662247965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe56105d844e86f55fa2024a0e10e095b84f5c5b67d1aaa7124f7ae7e392d87c9. 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/QZS642249349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2757efeedd067ec1948ce82b366218a318a9f0f502fd02b14575308a1b4453eb. 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/QZS662206154.
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 0x31cbf0fbe1e9490582677aa746f60c50b1046d682d755c0a635b743df70c8cde. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:33:06Z), 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/GXBDT2445027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6215672f976442791ae39fa9daa98e9c0404adbe65cd39340053aaa37c8014e. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/GX89G2542780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf2caa14fb7e69121c12a3e88fcc809a44061e6d4f1cca92204dd7004135bb7b. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:22:01Z), 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/GX8LD2520330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c0a6e8265eb5f5cdb3ad902a517aa70b9e09d14e3775154f2dbd58e26a7cb42. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/GX38U2568703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e56f29432313944ffc5e4df113296ac01c68e7c6616b53c85a99315762d8077. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/NL5UZ2513784.