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 0x70cae451093f1778f74bd2c40f1a7453d551fce74106316dab97d07b97051d3b. 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/b7aa10ce-98c0-4149-9af3-440377cc3adb.json and https://artists.proofprofile.net/proofs/artist/b7aa10ce-98c0-4149-9af3-440377cc3adb.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 0xc78b47a825aebf1970aabcaab07b8a1a3dcbd0017cdc1d5eab827658dede6eb4. 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/SE6XX2255326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba9a57d02f7a8d0b09b46b3176afc1dcf1bcaf517959ce357ea1f86c39eb0133. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/SE6XY2289139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb91d1b0de1aac6ee58393c4d78ca6c8cb783b9fb74edb54a947a11438fc1eed0. 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/SE62M2203802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09cce0068debae4183737f5008d7ad7cc48ffa681380a3200ada826cb86e58b4. 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/SE5752372536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf16967ae4224d50c7f24d45ec9c45de1aba36907991436c69fa7d6f0bba725f4. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/SE5752372537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6decbda926c4cfb31cc2aff499c9321f423110cbaa67b6a0fb763c51ad611d1. 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/SE5752372538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbc5d149ce510af842bcaf3c45af2de87b4badb11e8cc4fadae7b528439be56d. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/SE5752372540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a4c2d7b0261b80ffe4b79005d183cb5ce7a407cd518bd00cb809aa16421651b. 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/SE6I32392819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a4a457998a12fc5a531261cb2175f77d498fd82e001e5f93a7a88e56a896450. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T03:50:37Z), 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/SE6XY2318845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3712fb089e1cee6913b8a2033e6a2152ab4c477fc17860374c472bff58ca7e1. 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/SE6SA2333895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea4b0199b592799ad4e8aa7f86f20a25be2d3790c45e37b964f54d9119572c20. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/SE6XW2361665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44ed6cd59066a5b407765c67749bc1e643aeb34d831c49a6754715761a8fe311. Chain 2 (Bitcoin): anchored in block 956748 (2026-07-05T05:55:59Z), 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/SE6XW2329197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x143c5b302d86a411fbd22ad15c621030ba20b38cb296861c54de30807a8da30b. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/SE6XY2305796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0229672ed9e34f0d03e449f81d33e203d346533cc3e726ffa6c65ce9232a3411. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/SE6QE2382196.