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 0x0c9aab59b0243410dbf675c0c6b21661dca1de950a380af19e116d8c07b2007b. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c400b4ad-be81-42b5-9ccb-63e6a7d61299.json and https://artists.proofprofile.net/proofs/artist/c400b4ad-be81-42b5-9ccb-63e6a7d61299.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 0x2250b6f1e5fcb6263025c885ec1e39224c19e8fe460db3833ed14fdac93fe720. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/PLH492157795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e398ff2786f0ec056f215a3333b5e2293603c0e020f8a8f1d807a4cab20875e. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/PLH492157796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34e25d29916260aa1435b61f222d16b1259622b94046c448dab1b00517ade2f5. 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/PLH492157797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03dbc0588bd5e8cb6040798b7841cf0c0c760e4fd4994cb5896e019e5b3365f9. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T09:37:56Z), 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/PLH492157799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f74222f1306bf01c2af7a4c4fd1b58eb0561105d06cc0f9b1ef2a7220d93b48. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/PLH492157800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3df47a516060cbaf659799b799d39ecd5103c32ca8ddce788ac8426198fe870e. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/QZW9M2292143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b55811d02d2e3d41dd2aacab011efafd4c7c36a042572bae2a7162f58f7f8ef. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZW9M2292144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40c9fa90d0f9c62d5c66a9ea1b035d2f719b035b708e1c56cb1d95a9aefa6494. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:39:30Z), 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/QZW9M2292148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c1ed84c34e69ceaee3aad31b2fa510e05883971c5de3c9d3bc4c3b7e3f504ca. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T02:12:58Z), 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/QZW9M2292149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0275650ddf8beadbcbc276bf9f98de93429729aac07876dd2091871dafbc1402. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/QZW9M2292151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f2dae92061496f0e814a3419d611f784acca0eaf93e5ffb12d88f06e5fda990. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZW9M2292152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5e9cb8d5a14a76fe4d5764103609e91db1b7b055bf317942ca3779a284a15fb. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZW9M2292154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c77c9968a23530dc071989630b56cd04022505a4dbd017f3139b2577c5ddf0f. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZW9M2292155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfedbe49022aac0f853db074409b033134e8e8b43b410fa81ac4a672ffbfeb825. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/QZTVM2468454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x397b99ffb7ad383513eb680d6361e12da0ebe5cab55393922c59ad153183c11f. 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/QZTVM2468455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ead2434e723cc76f478fa43e872991c891171e3c653b80a3a6aa04b96d6a7b8. 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/QZTVM2468462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30fc39bb3ed9dc556bce91daaf1bd55210a8b9855a63ab43d1b5095e4a334878. 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/QZTVM2468464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9df7e169165845fa9395d97004802029414f47eb6e59b7b4199f19ff0e29473a. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-16T00:41:02Z), 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/QZTVM2468465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbee1e048fbcd2af8c178c50e6aba4a62cda4c61777f718b92efd8a49764fe501. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZTVM2468466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe3269303ba2d297ac7ffa30292fddb46c3d8ef3574d34be602c3273fce0c817. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZTVM2468467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ad8a7b21ecb365a97ddadca86f6cb20daa6a7ad3a47a1b2bfe9c11297778460. 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/QZWFJ2312156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6345bf4582ad4230ffa8f52933450cd016f0fa376a3db73dbc54822213192aa. 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/QZW9K2479560.