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 0x7e13daaed85b1036f50de4a4643aa97db08329e4baac7e4bb226336445b979aa. 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/8f1f1d96-5d19-4a11-98f8-fc185a0f52e9.json and https://artists.proofprofile.net/proofs/artist/8f1f1d96-5d19-4a11-98f8-fc185a0f52e9.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 0xfff8d2dee9d843a86842135edae6fb7451936fe029819406cae7ff4ab6674993. 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/PT2DY2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4070aa15b7c13488054b1cdfe3e009a11ea40a2c7ff60efdfa23831bb982dd7. 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/PT2DY2400164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x052c59f3059537f179481f2229af5812d7a441d4c7318afb03ddcc4f4263b91b. 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/PT2DY2400165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03bae028eaa767a3f051918be9ad2f30c56b60d795e38932aea23bb28831aab4. 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/PT2DY2400166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeef888d1a32863f42d02130270d9bb90e9b5f18f5e4ac76ea716d1d5f0fa5c18. 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/PT2DY2400167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77160a17a2e6e36f97c5f81d6eb338ef24862c4dfc230578688e6555c01d0821. 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/PT2DY2400162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17e97e4b3d4c0c25e634039038c1c663094ebb6617241614bc4c1a9e8e44846e. 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/PT2DY2400168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf41e8af73059ffb7198f30fa58a73c17cc9b1ca96cb90ad6c3575b313e3dfbc3. 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/PT2DY2400169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6a4bb5a79adf0c481275766458bd1a986c04284cb095b5bff3b0a21db41496d. 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/PT2DY2200071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e0208299f093e1813db1cd13d8f02e028efb6942f913be5ba7f31ee5adb8b48. 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/PT2DY2400170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb586521ec7c56a5fbcef9cdf2264cc6ae3b3a16cfc48c1933855606b4383a0b9. 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/PT2DY2400171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68c40e9e7ebfd3c173527028840de0ccf699e7aed4d9b80ca22764fa516d08d9. 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/PT2DY2400172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x527d52cf6c384e047f661e4f1dc7b42232c733c44c44ea536e94186e04a51d2d. 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/PT2DY2300723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4dc66c787ce5044746706cd59bfd9a79b88ce4b6e4442a674ee7dcdff0cc772. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/PT2DY2100268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad7f15e7f70f8abcc1da457ca98e1bba09452a80c21465275d81ff63d9b474b5. 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/PT2DY2300360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x785a885b7a367a1e0b449e8d2608a25336663d08fe982ddddf2049367e754ad0. 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/PTUM72000845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e36d804ad81d32236542100abc84d24dde1720f7f01ad2a128d19f9ccc9b671. 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/PT7EX2400019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7879d59bd21699474dd004a4d5e60e627974aced0eaa65e3472d14a8c0400c2. 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/PT7EX2400023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4b3c988bcabdee5c60bec8cb7faec2a6a6022557223d067ba4d84e7dbd6d20d. 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/PT7EX2400020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1759d3272a4aea00229637e093848a91f50d193b2424bfaf7e457f28a29cc07b. 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/PT7EX2400045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b4d5e99bd6c748eeead5b335deada7629c55514ac7a528369649720affc7347. 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/QZDA62409509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15736fae149e96a13a9a881ad94f10391cd881eb2b8468bb67ef28815db407eb. 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/QZDA62409510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d549b37a50b4112d6e42a99768130055c73ff944014b2b197cc566d9a259c7c. 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/PT7EX2500053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x824abe16fc29004334185d638521261546f697d77a0f8de107fd37e53864073b. 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/QZDA82563469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76ba441d5097ccc2621048e561bd08c7bcd0e880e428ed6faf081fcf75b9e189. 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/QZZEC2474009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1519e4e10330cf99c6c85a268ed23dda75005295bd7f33d015cb5056b6abc4ac. 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/PT7EX2400189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7122a8b950af676d237b11b383e03ccfcb6dc2d90be1d6e107b82293dbb2f446. 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/PT7EX2200133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bf0188325a76a126cd03c6037bf4f1e6dfd1fe8949c14a42f1337e2dee3992e. 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/PT7EX2200135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6a4bb5a79adf0c481275766458bd1a986c04284cb095b5bff3b0a21db41496d. 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/PT2DY2200071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ed0cf8e2c565165ed1d8f147ba892d36cc34a733edcf46110c43006ab64f648. 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/PT7EX2000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71b759a67e568fa5eb4d43f5e8d71f52049a2599507932d6c86b8d731214346b. 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/PT7EX2000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4cb88c2835229e8d447771de39d0894f0f93563f6330a5c31eb12590ad9180a. 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/PT7EX1900164.