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 0x08bbbb8d250fd3f548bd416222cd9b380f48e21ab9eb7a0388ee92bf70ecadfa. 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/3ba74286-2a7a-4d79-98c4-c885f96a990e.json and https://artists.proofprofile.net/proofs/artist/3ba74286-2a7a-4d79-98c4-c885f96a990e.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 0x3ac12c925a67e1494023eeec7f07479efa7e0d91d81683346d5591f2d3c37ece. 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/QZHNB1915768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9825fef01c7b27b92b619ef374364af8f3d3b2bf6983422ffc44d565718fb06. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/QZES52086268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa65c4e3e46a522d4bbc53dd732110eb4637feaf5cf9015a5b5761529c982e06. 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/QZHN62028367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x530934f518593a8b1014d7e8888f175664f84804f3d91cc8eb10927b952cc2e8. 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/QZK6F2037285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc11c6d940f5c37c57cae8c842f3c96800c6b04fdf80bf22303622e0103663f7. 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/QZK6F2058145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc8fd60dc92e30a018136ae9c051dc2b4d82331678a538640a7c6c149fe72e23. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QZNWT2038949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b3d8f3a1d4f70d224dbf2a23f4e0d2ae62f368683914c55468caa49fe7e6c3c. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:22:11Z), 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/QZHNA2143455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57469ccec9cea90c2d2a3a505d2b261fcb3862701ac9922e3a32384927066d1e. 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/QZK6K2195072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0001f1e745cbb797c5c719c41a307dd5c1e710f51d0e0bc90c77ccedda745ef. 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/QZK6G2108014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55fa76f81da6215e86b9e06dc56b6ea8a959269ca3536989ebd17be21c941712. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/QZMEN2171384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4857009c96202e8d55f7fe6ee435bc267422055beae108657f3ed6e6e693b2cf. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QZRP42142706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c1e310c93376e253b49ca232d008c9099d9623283b9fb8be8b6a35ea291863e. 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/USDXS2200349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaab711258c8398049e3a21f9311ead2a45bed09adb7faa3164e3f8165aca74a7. 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/USDXS2200350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c4bda640c62bfebcc95d64151e48ffde751877012e160a998754753049108ab. 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/USDXS2200353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b8484020b60b37fecda483c97bbf18320635823e4a364599d025e0cd1e79486. 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/USDXS2200354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d5d766dc7bf8d1a573419876d329f6258432042e3500e455fc6e608b53cd51a. 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/USDXS2200355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55f0f233d47d6b93b89a702bc3efe77b5a41c4d5c55c085ca348474e5e4b04df. 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/USDXS2200431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc039cd2f6228a570d0fec69aac274cecd02efbf2b42208c4373f61a1502a70d. 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/QZFZ52119310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c2a2fcb92431bd7d2b2231f7a3f88d91ac4aebbb327ae6f214a29c9616d4fd3. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/QZK6N1921209.