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 0x82af1bac374ad268e7e3dc04afa8da4966d0a09cbacccf1c363d56fee3dbd8d0. 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/082b01e8-b639-47d3-9d3d-4bee9012b2c2.json and https://artists.proofprofile.net/proofs/artist/082b01e8-b639-47d3-9d3d-4bee9012b2c2.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 0x5f08bbaf4f92116fe6f1fcff3fb185a7879ce59fe77dd4a118f7ad48b54dde33. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/TCAHL2324962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x822e3986a43323a5c695f44ec27beaf391c5a749db4e285cf75fd8b5d6470b47. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/TCAHL2324971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x104f5e3e11f98131a4f48868d17e0665afc72fb4b8ef61f98c5f84e923427c82. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCAHL2324973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e8c6659cd3cb616827d535bd5a51b5ae2aac73c42f3a05f0c2f44456b0e4910. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/TCAHL2324976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe940f53673ad260d35f501b6522753399ca2cc4b54257444957ad3c21b28c4bc. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCAHL2324981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd72690d88a177aaa1d156cf7d3099f5adb9d4bfe81feb8370db573478201a7f0. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/TCAHL2367443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa45b3da1450a94321cbefa70d85f8be08c2541798c63edeb5e4592941e669e82. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/TCAHL2367444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25d811d8cc23f89b59d316d884d198b6b20bbfa43cd34017a9e81ed61e429f54. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/TCAHL2367446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2aa52edc22d4847349717ea81becd9e379c5a33f3b8b9ea4325ad743affa0f5. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/TCAHL2367636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70d9cae24b04ccbbefb15e1fd40d246c8567a5e36f76eb7d9f3fbc681ab3e4fb. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/TCAHL2367719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2ea480674cb9a8367dba22d1f16454c6174a5510a8065bab7115c9e60b633b7. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/TCAHL2367721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf794f1cc51aee4ee094f944e55e2829dad358743ab46ce897ac300da6970424b. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/TCAHL2367722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa7438f6236644c8900a9386572e228418010a87493bc4fc299fe539d605e9c7. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/TCAHL2367723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02c6dee6d0c45bf6683d0654b71db5714a0d095718e2ce6fa9572bd36e79d817. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/TCAHL2367724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a3de5fbc0483f7daabd08da02cee151c129505d2db6d6a9e5b56e4fe55d4f4d. 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/TCAHL2367727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf01b1122d15e8c592180f8121d63ee55b34992f67141743fedec2ed2a98947e. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/TCAHL2367739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed61e8faedd3524f59ea630272fd040630213ab929a0190a1a69c3a49888b5f8. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/TCAHL2367747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a688b34d7b7238fdab01d62005ba2be31d459a86ad1accb29718ba472f9265f. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/TCAHL2367750.
Firm Foundation (He Won't) (Lofi Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56fba4548488b24cc198d02aeb04d6a13bad76d18f45806a8b6ed3cb4caf4748. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/TCAHL2367752.