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 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 0xc65256b2520399b6daa866315f335a56ddcccfbac23de1d2fd778163c09ceed5. 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/fcc752c7-8946-4440-a299-78e07ef8c449.json and https://artists.proofprofile.net/proofs/artist/fcc752c7-8946-4440-a299-78e07ef8c449.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 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 0x7b38a253d7fcd9cdf5b88fbc47857ef90047b35538864c3ee3bb04ca1038514d. 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/QZ5AB1863099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64308921219705c8ce84e4160e1f6ed4219c5bd356a01cb61ef9bb17c685750e. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZ5AB1863101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b5aa15d27e96e179e798f81b58fd37c1901d8ab874dc991c4fb0e7ffe585554. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/QZ5AB1863102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x835fa85e1760f7afd3aa9f15b018864e703b7d8658acc5bf25527296268c78fc. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T04:30:07Z), 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/QZ5AB1863104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd28596f64eda1164fc175f6070843b31a579c93131d85846eefe155f7f9ba2f8. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZ5AB1863105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd08868e739ac66c549331482ab7cf49cacada25f0f707bcb6d159f811785a32. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZ5AB1863107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4f655b338820468ab25374098cb9a1f98ceae7aa19fb648ec228f6ada5ab2a0. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/QZ5AB1863108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61ac36e08d91cc9f526cd0dbb98f941f1158d0156f588b42149efbd2604b4334. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZ5AB1863114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c0cd50edc8503df9e9ea641bde4a7fe2aa627e551243eaf51ab808ab4a04474. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZ5AB1863116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x225a4c4b5be066c07be4357821da5c4e07c6662a6085a1b87467c1a5f7f8ff20. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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/QZ5AB1863117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x104957ba808c6eec11d8138c47601684ff57bc0e6bd4b814123087e1c7810258. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QZ5AB1863118.
Trio Chapahalls (Ao Vivo em São Mateus / Es)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2fd82c14384eb647de8cc2a26bfc717b233419bad2103d2bf843f0a42c269c1. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/BRMDM0600376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32925eae488d3a62b4468d1ffe503e5349c402288c5140d7ccc747a2b049adec. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/BRMDM0600378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd08f31efa690f7a8f5afe47ee3c9889a3811022141e67dda78cc916b532817ef. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/BRMDM0600386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdec38a26eec1d478dcd3d3718688be5928a5b5c6ba2ea005570f90e3003ba29d. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/BRMDM0600387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddc101987f0128b2302f95a28bf0b5ca87650e12d330ba66a8bec243e06ef6bf. 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/BRMDM0600389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb65f381ae6a9ade0fc4a354c4d06c9d64c08a36e831ccf1993fff20326916e0. 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/QZTVM2268813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d6d60642b54d8a3df3b583897a4caf58eca1e2f1ee484a48fa04b089cce4267. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/FR2X41758453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x406ee4cf791ab38527fd36265c43fe2b53ca684dccfa46c294afac9f0563d7f2. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/FR2X41758463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8874ebed8bb3a4a879f231526c70561da205a1e74d46fe020f795e491d879a6a. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/FR2X41758753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x020c2bcd3f8d54de560125a04393cd34ec047e93bd9a880c48ecedf042d17b9f. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/FR2X41758754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fcfae60c2603e797ba07f4a224bbaff517cf443debae30c5d3ef3a005c8982d. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/FR2X41758756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fe5e368cd500b855a570927c81fe3f8b1dc8aee27e3bf01240c1c9e7062bd9b. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/FR2X41758759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x945b414c550c639ce154443ecd7d5938c1717913cc1b57843d66e830a30dda2f. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FR2X41758490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe103a537949e1bb968a79f7e33bb7ec807f15c16581367b0dd159a4f8ca6da56. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/FR2X41758491.
Trio Chapahall's (Ao vivo em São Mateus/ES)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ddc79bf7a10aa79af1b45fb67cdcdacaeee8a37559c288a8e3b7bd46eeb3e02. 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/BXNT61904155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c5dafb24c4d8d41e47419ff4acfb895915331ac73e042cc3f7734b1a05fd304. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/BXNT61904156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b7e2884a69ab5c9d184e9ee78ae2815a4d9533429b37ae8794e9276d8ca1d81. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/BXNT61904157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd484cbee3734717821fcfb921b586035f000eb6cf907e88a02c91d4071b3a41. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/BXNT61904159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec53b561e976b4d6383150422d2be4b7f011f366eb014e7f962d2eff71e49b41. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/BXNT61904160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a96ac1e19f64e5b234ba9a83ed7132bcad3dbaccb64849900931ff1cdf60531. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/BXNT61904165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b0c714dd1e9c29c85225c0620ba64aeebb7b0526c14e5727302fdc34f873cf7. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/BXNT61904167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d2703a6b0b63e71848e27f7fa785ea579615889dee0c0a533e3bfc7c858e3f6. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/BXNT61904171.
Trio Chapahalls (Ao Vivo em São Mateus/ES)