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 0x64beba682ddcd5fb2324f02b5b307308e6ff58446f05b8e304cff62c89e8a74c. 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/8a433d38-bece-422d-ac14-63fb633b8423.json and https://artists.proofprofile.net/proofs/artist/8a433d38-bece-422d-ac14-63fb633b8423.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 0x14600630092de82c5eae721e460a6960b23afb16f01e5ace71b256481ad58abf. 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/PLT522100038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1761c28f8bf1514a9e5bc4b5bd5be0fffc3ad75eb6dd7961a5abe645dcd8c7d6. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/PLT522100040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaf5adaf9ad7431f0f56782103725f3dc1b9f49cb8d09a53444b08e251289d3a. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/PLI360611230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7769f8aa2f552b675dc035bf1f0af003a3381fec7851b6cdc057450b463920b. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/PLI360611240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b65e8deb87d0a32149daec1a345b1a672ff23b2018bc5fcd28874be686217b4. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/PLI360611290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x682ccc89fe80d152506210e77aa9f079d915207a758e28ac3e7ef7157a88d778. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/PLI360611310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d046d35e804f592d6f0d51391596fb7f656a2e3e1025cbde76aab68eeac20d2. 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/PLI360611330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87330208d6bfc5a08715d969dcb94a1b02790adce668845f40194ec914b47bc5. 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/PLI368353980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2ef3a4e6f22d5240900e6bbe19361da310fbebae07bf8dfe9193ee942b5fc8d. 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/PLI368353570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07929054686d394e95724199477607767d5c795a8c0c9c3cd0a1582a70a75f07. 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/PLI368353580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97476626a0af9b47fb04dca054cb0b0389fe3770fe93c1763125e465f5a92aea. 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/PLI368353760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01c8296cd77593667e04e81b0803cd3240d23fdc21e2535f9bc0b1055947d069. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/PLI368353560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b522de98a2c60b0ec0f86afd6b54ce861c8c298a1b5bbcdaa531e2dc6798495. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/PLI368353780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06a6ccb6692e15c6007347d836be1abe44e66e699bc3d48cf0edfadb6348f0bb. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/PLI368353590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ac3b4ddf6791cb63628f7e3cd5a9fc93e1e99931a030f4aca923d957fae7e25. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/PLI368353990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf724e2a5c336e617c31ca3bcc0be5581acd64d6fcfeeb57139fd8363866f77ea. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/PLI368353770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fbdaea1aac7d6577b97762bc7c2033e795e0ae0398a6a6533ff062ee5745432. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/PLI368354000.
Mental Revolution - State of Sound Remix
Przestań się bać - W Moich Oczach, vol. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8275de943885c44c80b0153170efdcbe8d3d956a6f0a8af2557aa37d1fd786be. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/PLE551800030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82f8258b33e9879362c4243c88eee06d872756b104c0b95819d625a5d2d1bd46. 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/PLI368353790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22ddb5e4a78e2bf3a04ebfd5d5ee66221631c3e3b95ae4b25954930e4be60970. 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/PLE781300224.