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 0x682c10f99e5885b60328579eb75b320fd2191e34eb9a1246af4a22f28e7c6362. 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/cf8bc937-a063-4bce-82cb-cfd3a937511c.json and https://artists.proofprofile.net/proofs/artist/cf8bc937-a063-4bce-82cb-cfd3a937511c.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 0xfc46e035c7c8111c3c5d936e24003502c24c833ff03f86e569d71022e3c98c32. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZHNC2347491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2637136170ece774f48abcc21b11921e62bf239370610fe121774651ea5c8f2f. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:57:45Z), 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/QZHNC2347492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x037a2e0a519e607b77069f0f749a565bca69f1def24833101a27a64ee6da97a3. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZHNC2347493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86cdb3f084fab6c0b6fa224e960f27e85a12219a34917e3a38663a6b70a1f436. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZHNC2347494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc4ba6a7787d522ab2ca3bf784addf1c98a433a7c162ea3aa57e97728099c988. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:30:42Z), 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/QZHNC2347495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3877092c0480a4dcc5fea93edb54a332c7778acf4212a53d313ff898cf769a4f. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/QZHNC2347496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdb0c47d400e11b342b90381e70b91b655431c7af0ac98aba94144d085ed6b4b. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZTAZ2251406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dd2c993a79ea611f0a9d5aa57f286aae24454e2504fd4b0d10026759de517d9. 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/QZHNC2347497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68df5e37ccb3a1c67ad39e2a3f94a7fcd623ff9d29676cffa978b604d4d27b48. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T12:05:35Z), 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/QZHNC2347498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06e42d296fb6fd30bea70d161eb987fc444044a95791173354505bb99efdfaa3. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:23:04Z), 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/QZNWT2340011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73e08a1a17163c488af5ab47165f19a5b6066e30266d56bc333c754bd631a849. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZNWT2340013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a7773617667c827b8cb99a6a87ddc4b977ec179ecd5102a238385225f96f7d0. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZNWT2340014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x696cc6d0ec98103e801d793a61c6888479a2e20162c3f5d826b6651e4a3f3f39. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QZNWT2340015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf96f66d9fe694340ad4526b80b1df417a68dbf993946f94d654adab62a7ae8b7. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZTB92314958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff71975c5e1511eab9315e1066898b69a46217700fc61cba3deba0c1f8a75eb9. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZWFM2363733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5971a77cf0a42b083e6c387afaa44cad22782a8d6e0db445162f15028ae394f3. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:46:40Z), 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/QZWFM2363734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9770447973cae86f47c1faaaf8e38846f8f54f562775bbf8405681ad54655c4a. 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/QZK6Q2476301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb70da087a3e4d4b2c2670cee7c3bf277e3797ae9fa8849172a1e5eb1a5fdf79f. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QZK6Q2476303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x748aa9f29bf3a1b0321d2c9dd7c0fa9b6b804d55a6a9d1e6bdeeaad6c8c30b38. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:04:53Z), 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/QZK6Q2476304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04f421e762ca9723a66878eff6ad23ce86fd50b946283d79f7fc51c49fabbcf8. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZK6Q2476305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab73655671504cfe85a636ed0bc1367c3f6e813def477b556beaf4a45126d699. 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/QZK6Q2476306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d7b8a9b5c331e96128bf892a3863bb1735dded5c3f05205d6e9fa0e258aceba. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QZK6Q2476307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc10b60d4b0d59e5df93f0094816809ac0363d1d978a696b3c8a7e02757fc0bbe. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZK6Q2476308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32095156dc2509c38644d94f239fd7880e4e4570369d4ba934c200e97593685c. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZK6Q2476309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x171b3256f1898ec256f919bc491318dc46c63a9bd029e8042b55febc7dada1bc. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZK6Q2476310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5729d7f21f6780fb98929dc819f3f27dff8265a867d2c7d13760922c432582e. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZMEN2472154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9969423b048f90cc6527fe8e8c71bda4fbf8c30c8e332d0c435d4c50510545b3. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T18:46:49Z), 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/QZMEN2472155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd16c872de635da4ba1f082894b5ce532e87d28972c83359a1e9e6cd17fd2ca52. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZTBA2474324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e36dad77e58d75135c25849cf667634f90988a5f4748c370ece7685a37b8d26. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:04:42Z), 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/QZTBA2474326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5d8a371ea33122c0a5b80305ac0bd41098e1149a3009860cbbf3f430f58ad76. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:23:54Z), 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/QZTBA2474327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb82b9146e18e314c6935a03a4922331b259abe907e489722a416e8691e36080. Chain 2 (Bitcoin): anchored in block 958666 (2026-07-19T05:00:30Z), 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/QZTBA2474328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2b9c3acfe6443c4996a9deeada7b695640f4282fbd67caddba7df792d14a778. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZTBA2474330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70af3f40ae1732176b3b41964661054be40e9aac0b6f5c059ac8ff1869cdd2b7. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZZ7Q2451694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b451ba6ec8d2ba6d89360b225fd122912ff4cb3b8a16fc4f6527f158860f8a9. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QT3F32459539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbc1ee140c6e5eb634d3245dd63928d3ca5eec6af8517d7fc1f835dca3f8c744. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QT3F32459543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1022671797aaf2b8abfe1378e7fa97b9ef45190a2982b3fc447b72ccfcdcced8. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:59:50Z), 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/QT3F32459544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4cdaca87356ef3e890bf6374b6671ffe461c903bfe2c788ffd0d6429899234b. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QT3FA2568087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63c22851dcdaf3b12e32d12df9ac3865c6b3f67cd1ae4720006b94b3efb7636d. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T16:30:30Z), 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/QT3FA2568088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x272422b6910ac9e59b252387753fcc1abde295954fa968ccb5e6ddfd0873690b. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QT3FA2568089.