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 0x3f77699d1508049ce00c806908a66d652355b7a5df60f94747ac589530284c81. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/daddaa2e-9631-4681-9612-15400be94344.json and https://artists.proofprofile.net/proofs/artist/daddaa2e-9631-4681-9612-15400be94344.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 0x903d41e66bd0d7bd263e5747be68d25d0c603e9511a05cc9e937b54b8055c356. 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/USCGJ0612361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e4d59e67275d08fef4931959c6e8b472626d36d1ef02b01ea649413a713ef47. 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/USCGJ0612362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd13832e25d8b8b6ba2671b35225511de87c700c75e787a05b2ea1a1f4654f25d. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T10:52:10Z), 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/USCGJ0612367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1692e86c38b1e8c518282cc652b3011c83cc1ed29371739c975bb82b12102a39. 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/USHM80683531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7335d69e06b90eed9e27115240fb169145a6417d25ee0cc28d96c328d466288f. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/USHM80684343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7df5000bee8203f4fc37d41d30e9910c4b431811c20aff35c6c3b3a61ffaf2f0. 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/USCGJ0612410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52208141cfca8d66c1fe9c8f0ab9fe40568691820d91b9edfd5abc36a4152161. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:42:17Z), 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/USCGJ0612411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1605c088f6588bc7d99e6dacad3d20160759a5aa0cd63f73eff70fde4d34603d. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/USCGJ0612412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f96d58a888715b7c4bcc3d2586ba3126283e360a9ef6d0e6ea926055c96af1a. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/USCGJ0612415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3b17863fe5ba540825124bc747694a0c8d3a286beeb9c3b902c8205d1791c90. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-17T00:01:26Z), 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/USCGJ0612417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20ec5cc62075b7db19cd859e7b582369acca051c6daf6efe1a2489f4b6caf6ee. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/USCGJ0612419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcde3c9b2fdaae4bc2587bcd6f10b4c05c72bc60da23d68cff90859845d09d5e0. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USCGJ0612428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15cbf306d1a3520076f15a73efaa78b4d03c51da8520517b1443fe478bf1c51e. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/USCGJ0612436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x591828ff02b10d57d50d7d02963f2bb2a7b34c2cccbdae77b1f1761862d26eec. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T10:55:51Z), 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/USHM80689070.