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 0x606159ecda50f110d3e55de5f99ad956f281f64455878768e32d6303b53928a6. 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/a3a6081e-da41-4ee8-a93f-437da3194f86.json and https://artists.proofprofile.net/proofs/artist/a3a6081e-da41-4ee8-a93f-437da3194f86.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 0x74deea5030937cb68f3086f6dbeb50b0912a80b3ba729d6710d0d7488836a8b2. 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/QZHNB2161792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58936597273b7aedc338d98533e6de899b355111348d3739e68f6770508d2de0. 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/QZES72153282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b5b912f51e3986712115049eaedc3caaa51a93555af3f47995386a0340e04b8. 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/QZDA82153392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfec7f4c2648e6ad7136e4951db16d58ff85fd0907a89e99925cd438b378a7c17. 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/QZDA72319053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfedb76f7c2c0e688fcfdb048cd666a3fab1faa4e5ce4a64c0774df26a25f5eb6. 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/QZDQH2381641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5554f67b98f75ab2a173d909b580e5f4d24255babf219b11a7d92cb58304336a. 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/USA2P2349688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x587cca2bfbb3348d6931f60e58834ba60f828bc3f6997395be0aedb28d38eeb7. 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/USA2P2353735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46986bae5ee276f99edb4d662850921370a7d67c6896e65b4004a7ee97f3ec34. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/USA2P2352471.
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 0x17b094ce96b63bce559a584d328ad36fb5f7422cbe5bc814b43fefa6e962094e. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/USA2P2353733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca632aa824e8baf41af5210dc3ebbf0739ab167c9b6f944e26c094108bf6b3ea. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/USA2P2353734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1b21fd9b6869666fabf7e38cdc24d9c7844ee52bed241fa8478136c3aa796ab. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USA2P2348966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27485f06a82b21da7dcb72d660177dfaa40d297065f19c8452f9fe38b2528678. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/USA2P2348973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf33154d9cd65f8d77224923d6cc3c3ad5e372158dafbb5b7c5bc578c54b07431. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USA2P2503524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc58fbffd042f7b7116d0e38a503d9799d0dc089cadef3a6d6893ac7483fd03e9. 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/USA2P2472144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d370d03cef91b82cd28cc05b218027732d7c9d82dec19f4904073d3ba4eb53f. 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/USA2P2443148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dc817e451ae38acd4aec197dcf839d12f1e7de177d139806b6eebed622a0def. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/SE6HN2432034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb45e84899e3e162a31d57ed7fc485ca55dbf831a77b114739d1b831207a7139a. 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/QZDQH2420601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50d509de1c3c9e6ef88e219945e8f4fc1c81959ea8cb669b04a31a3da515062e. 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/USA2P2424358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c336da232c279a036d1144908dc8157f29cf74fb26bd8caa6706346fdcd6546. 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/USA2P2424362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde11778c0f0b4e3cfb9ca5c362a1c76ff9ceb25a51e3d68c66e9e2b189a393fe. 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/USA2P2424359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe86ece19b1a4de7614e2c269ee38939e49b93ff5c8490a76559a616758990f5f. 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/USA2P2424361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40ae258b9cc2b850a355c60280023fdf25097b8e70d67d2dc2759936094eded2. 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/USA2P2412332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbee70770d002d8a65276f32bee08513c5aa188f7f93b40e6822f26aa2142ecdd. 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/USA2P2358684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99511f24718b2a1602bb43b1f38f0f6d4b62dbe9c86e883bf1753c3a40e50e17. 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/USA2P2348050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x183c6b5b3a6aed77308eba9ce705c17be6787923f8ee9f938afc4be462f2261a. 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/USA2P2335816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23127565e2f06b2fd06de6c295b9e9558358e3de4beb90af8d06deea6583bfe9. 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/USA2P2334373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b30aeec262a05887fdf15002c588cf470cc640b324508c86e08e2f02af6dd3b. 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/QZTB42221230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f370cc2354f5c4877286b37076a2d028ab231f06e425175e2d0e91b5008cf29. 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/QZTAZ2275998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce41d8a7cda935add7759861e17380a8355ee795397822beb4d6758592d05847. 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/QZNWY2228910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f705f7fb272986045c1cceb648a28ba158bcf45b477d449e63ee2a61c4a21c5. 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/QZMEM2226834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x335fb2dcd7dbebb039acd06219c7160150f67a9fef0eae0468511871c669d56e. 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/QZDQH2255202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x953a21f325d2b8809094d29b88d3af7ebc008dc03b16be577b9afeff20ebf8f8. 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/QZDA72258714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45c253f23558583f9e574896432994378022e7570cac0e7f5809cc273420578c. 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/QZFYX2276535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0cad0d0866f1319ae71b3e27ab7daab7859248043876e576100780886e57f37. 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/QZDQH2147567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36d055a63d397df77b983b2bf94e0d8e255b29c024bcf7a5b23fa01cf5e0357f. 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/QZDQH2147108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7194667438690117f53ee3dc2b2af1595ca422eb8191880be530e5d9528a2251. 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/USA2P2236461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xede6d159a187b8d8fc354893aafc6a8f8af7cca7ee9792254c1848635797e3c8. 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/MXD782301070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x021c5932e2eb3907f819c4e01b54476ca54c0cd572219808aa352470374479ce. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:09:10Z), 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/SE66N2255803.