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 0xaaba8e24b34108d8638a4d39bc1b987e0ddc66d82c7068c53215cd47a68eeb1b. 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/5144e6a4-1ba4-440f-bddb-f38ad0c698c6.json and https://artists.proofprofile.net/proofs/artist/5144e6a4-1ba4-440f-bddb-f38ad0c698c6.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 0xa7646cada621d2b5e94b113a8cf918f7bb3578ad1e724b918462c1891b4eb86a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QM6N21907789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac27c5d4ecd0c43f9b983f604eaea171b45b5ba91096f037d737168943264777. 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/QM6N21907790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbef4c5c150f42dbeaacd35422aa5ecfb4b5db94be29231a7cb8c919985e5d044. 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/QM6N21907791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9f459ea0832b5b1e81c87cafa4ab915c83fe28624fa248be97938bab8cc5e5c. 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/QM6N21907792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6c4f9c5d0794f75e7c36a9a76cd5c597259562120c8ee678c79ac0da4016d37. 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/QM6N21907793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32dbd89dba3e78dbe1b10a0f73365254b8b6d84c1a29ac9443715a254409c860. 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/QM6N21907794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8963610071395d787e65b1435ef8ed80d369a8c844d1b8568184d70a6e80c96. 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/QM6N21907795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc82a172091552d81d751f4c6c459584bc3823ac3670ad693112cc9a9432490cd. 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/QM6N21907796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff0f2a68f84d73cd8124915239d4a364b07574456639dd02bf4ad3d2c728153c. 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/QM6N21907797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72575a2db120a6d7b1ab322594d4cd514907167f8d448f5e568840f3a0b783e3. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QM6N21907798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd41432b04c3d69ed7d37c41ba34c3124e41fd789c9e797f8df85db082b65fa16. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QMFMF2023456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ccdeb27f0e211a3b3ce05f8e64552eb9fb8e76161dbac9d4b41d8bc77983539. 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/QMFMF2023457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3183b44546cce062cf9d1ce33d26f538f701be6103c0037c1faaff8f2c0a3375. 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/QMBZ91717416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3edddde93e2bbc942607644d6d69402bcb00a0d2848ce0a2ce063ac0ffd52f2e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QMBZ91753580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71504265c3e6af879b7df70a8df5beb6c9d0b1e31eed5cc518fc95783f51150f. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QMBZ91753588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43f4123d9bfebf240de3eb52f9cba2b2f9272ae27219bfb81a43e269c032462b. 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/QMBZ91753601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7adc1e740ea9da47df0f35fbf52c08e10874bff42d700c52916c8815176bf2b9. Chain 2 (Bitcoin): anchored in block 957057 (2026-07-07T15:21:38Z), 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/GBLLT1617675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x813210fd75d6eff5c38e46df428bb68f8cb7e2fbce6e544394f456f62879c947. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/GBLLT1617676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed6cdf05fa8cbbf7f4976c2f2ceb41d74e85719bc28034d26447a7466092eb44. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBLLT1617677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1af44eccd17c9bc35c902454c906884a45fd1d8a97b7a7b24265d6510090d6e7. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/GBLLT1617678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c38b10ffcd74b818bc9b5d47f03a72bc1ac3641c362b016e38d444619c8cf2e. 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/GBLLT1617679.