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 0xf88ac526dcbc2dbccb4d3f0f1295ac495cac1c9eb6a26880eab6862304799ff1. 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/25845e07-c67f-4544-b5b3-c83c0a187385.json and https://artists.proofprofile.net/proofs/artist/25845e07-c67f-4544-b5b3-c83c0a187385.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 0xc214e33caefcd8dab8384250417277068d097d72ed9d30048adc6970c9d2cc89. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZS642470408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fd33579f4b420faf51976c78f9b59e04b59a3232fe4492cce9f2c8152834fbd. Chain 2 (Bitcoin): anchored in block 957761 (2026-07-12T21:55:15Z), 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/QZS652423800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb901191c2760352ddceef139367bbac35bad1a8772a7c5721ba8048ba559339d. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZMHN2461450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43cf0c9f8c98c5bc6d0b286d63e2e215d4bdb53b148875c0d056197c34e38d6a. 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/QZS672471489.
Als man mir das Tänzeln verbieten wollte...
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0d7a4cb2756363a601a1fa520c51461a6706237a3b5c2e785646544060e1a2f. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZS662407336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x710391d3329af1938dafbd9a21aefc7b396933c5a83825537a0a12135a5e6bf1. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/QZS642436046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0d762b084eff7f4d193b87ba76d4b3132f6b1f2bc4e5e24f729d4044cfe4edc. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/QZS652425905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca851bea762f081f22d29da7f511fdfd3ab6174226ec2ed22899ef4ab2189a6c. Chain 2 (Bitcoin): anchored in block 958510 (2026-07-18T06:38:22Z), 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/QZS632445196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcef462e27d87f4236fa7e1571750048f337406bdaaaa5a80726ad941e814b642. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/QZMHN2475441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91a9a775d3c3681dd79a9f66436e72c640f2b1e1d29629570347149d38e34b0f. 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/QM42K2433453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x736a6ee1a87dad0c28b256f50243107df890ec57daf613132c268251f08d8499. 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/QZS632425398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc91987a6af9c835c38d6c05eec3bb6a529ff41b0d859c4fdfeff9474de70f72. 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/QZMHP2475843.
Tänzelrundgang um den Wald der Tänzelhexe
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69d5d21a8e176683d5bb4bea6cff3f3c08eee3d628406981db55636fa261a61c. 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/QZS652412522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed59f8c74a971072eec42627e465a93c5cc7b99443e61e487ac2a6b48928e166. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/QZMHL2458494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92c44635c902a9b93b5ae2e757b74fa4956edbc9e1c91c4256b919f0c82aced4. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/QZS672422747.