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 0x8c5b5127640a658d539f193fed45b9417930eda02f7e54f07b25e08eaeb07a91. 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/8e28949f-254c-4135-acee-ff9c7dda13d3.json and https://artists.proofprofile.net/proofs/artist/8e28949f-254c-4135-acee-ff9c7dda13d3.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 0x5f44c1a4fef727f8f2bf9c7821dd106a8a0d6cf18421e4e3c4e5febf12df98d0. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/NOMRA5801090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf192ac4fd29c403850306922361fffa617caa27ac243d3d1388f44ede4f3fcfc. 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/NOMRA5801130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0143380d1fabc5a6e0a77abd27ee560382f057346c178e257a609cd5549af56. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T09:58:08Z), 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/NOMRA9701060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcee97f2e7c7eed28adc2aae5fd0b0c64d4d77be8efd68fda5bc9ef54cf9ef99. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/NOMRA9701080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7d5644933c1b2a11c9fc21c40a2ec56279d1ebf3386e4baf10f4c9c69f994b6. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/NOMRA0101070.
Merry Christmas (I Don't Wanna Fight Tonight)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb8f559ae9625e6ee73e336a6d04aef05426763e7a7e47aa643af68c787791f0. 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/NOMRA0201010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfafc8b89fdd3bda8c6398eb87dcf93ff2b7238159f7716b6abd4e928676bc0ad. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/NOMRA0201030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35b1378dabf4be25c8f59efe89c3f8a29d8275f8d83a80b275b5bea346a2f618. 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/NOMRA0201050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90846d6c2ea60b376d24823ad259f8472699d6c96fa93b0e0f850aec944ffe68. 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/NOMRA0201060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16b328685108ca7a8e9db19fd433c8b5d7b056cd7709d9e6bb3701607ef531fa. 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/NOMRA0201070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x711c054fb0ff4074ba6645192d05b0bbdf9156473519f1aaa863e2a028b8a51d. 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/NOMRA0201080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8f4cbfd39d7499b6a60050c3c53ff0b0a86749d3fbda455b34cedb4238c4135. 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/NOMRA0201090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca4957965a09790d8ae3f61c659316aa5ffb328349b8779ff283a116d064858e. 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/NOMRA0201100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38ff28d8c18f3acb9836ceb47930589d280367b47a7b0ba84a65cd3f7002d78a. 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/NOMRA0201130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf870459fe804757851f8321ac97273b2a35f266d5850520eb9ad5d3c83ba13b9. 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/NOMRA0201140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6039a7b800139faeb5bac16028f7d5be61811b2fd4064c6759cc5805518f5ee5. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/NOMRA1202060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcb5526792feb3bdf6c0d8a728c36a77ab56e6af27ca57c483dab64068f94b89. Chain 2 (Bitcoin): anchored in block 957544 (2026-07-11T09:08:48Z), 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/NOMRA1202070.
Retrospective! Best of Toini & the Tomcats
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ea64b6d74797b01803ef995e55a562322a27acbb9eca3a0bafaafdc9e2da3c2. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/NOMRA2201030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19ca42f9f80b1a1390bec3b600df34172b00843c6072d9bafa80c2988443bf18. Chain 2 (Bitcoin): anchored in block 958654 (2026-07-19T03:55:30Z), 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/NOMRA2201100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3f11bd54495fddf1e16f38dd6ec309f6d755fb2c5271a6fcfc8608e8b23d831. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/NOMRA2501010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x910c8222ef1d45224b6f7cf22da59363471c9ee3b18b4b4a5f418291aaca7885. Chain 2 (Bitcoin): anchored in block 958963 (2026-07-21T04:02:02Z), 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/NOMRA2501020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cc7478577c39c80954df4053c5cb432421636da9bd629febb7e0ff17c1cbf11. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/NOMRA2501030.