Toner may refer to: Toner (printing), a powder mixture used in laser printers and photocopiers Toner (skin care), a water-based lotion, tonic, or wash designed to cleanse the skin in preparation for
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 0xa43614d24ccf157fc166612320f7137bbbce3594e6be034d4c9f3b96fc0b5a8a. 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/4d76dd2d-aec5-4623-b928-4d6aa080c671.json and https://artists.proofprofile.net/proofs/artist/4d76dd2d-aec5-4623-b928-4d6aa080c671.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 0xdc2f3f74aae937d7fe77a780157f58c597844fd8450793e495c92b18ea2c1a16. 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/QZNWW2448674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa7a78b2d8b631fb34a75d6ebcf26acd0f59334d01805360ea3810bbe9855ca9. 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/QZNWW2448676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1cc745c2f29e9fbbca8e3810efb7ec02cd79529f2c005e21a2e9b5f5cba69cb. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/QZAPG1733183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b060307c05d6f5af34327b99fa41831a52e35a37034e4e7c4bde920f8d42ec2. 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/QZDA52039468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d9c356beab8f11736ad6630686ee1454de74b8e0c2d836dbd590e7c2ed97d9f. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZDA52039470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa21fc498a64ea0094352e28d60d2d4938d33a55a90f69c48060c634c363fc8d9. 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/QZDA52039471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6126ab6c9716bf6070c2149fadadb34165b9a62bebbad23e1e616ff2855d2cf9. 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/QZDA52039473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x958fc12fb3d3bf17ee2561b584ccb8caac9805738072104aff7c296b672bf4a0. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZDA52039474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0da8fb88fb860c6128b3751901c61b8cb56e1acfd46aefb9ab1f032b2dba2f7. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZMEM2183884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d12870ab46fc6066054d2909feccb3f80dfaa10098150744a82da6b326da8ed. 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/QZMEM2183885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeef607774330b1a822a599a53a8a05fb0bfca96b9fede263dfb991fa4a4b0ea. 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/QZMEM2183886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b5d2c14308bca77783d050f1066b601d0c98e50d868bcfa0523577045d5327d. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/QZMEM2183887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x526a9fd2b87a5c3776fc10d173d7fd1362028c67f57c0d6f5eabdf070dfa5747. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/QZMEM2183889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e83345aa93f9509ce7d46a2f9801013e8b3e362db2fe02c825f19eb1389f844. 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/QZHN82379328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46a73e0e7b78b95c205d69374e99b23661a756be7fa460bad21303350f54952a. 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/QZTAX2311335.