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 0xcfb156712b1c0ead1abe400432e8bec874f47d94ae9197ec87ee382a27106a83. 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/aef63257-3671-4037-9220-d10633caf555.json and https://artists.proofprofile.net/proofs/artist/aef63257-3671-4037-9220-d10633caf555.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 0x6c97cf0193031139847c42504078ed90e91253963cf99ac1cae1ab848591c86d. 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/QZFZ42022541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefd77b38c56625f74c9e85ce070e4f9f35f3399d9e5f3f293bc8def8b6d8897b. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZFZ42022542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4fe3804a666a77fcc89fa5aa07c70fe61d66e2947deff9298718999acaa9b1e. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZFZ42022543.
The Club Hits of Today Will Be the Show Tunes of Tomorrow
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9214f7ebc4cb6f00d6d9aeeb099adb1243f316cf9fded7f74cb0bf0d0afc5e43. 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/QZFZ42022544.
Fuck Everything (Reportback from the Nihilist Working Group to the General Assembly of Occupy Tucson)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x521a861fd11a868b6c14f42db16b4890ead4c65f54e85f24dfe621d153cc18c6. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZFZ42022545.
Exploration of Coercion in Everyday Life
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b3d769ff8cc52afbe0fe421d9279fd8bb5bd6036de2af39d8f4b827c5f8dc4e. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZFZ42022546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9fc4c0f24d6d4d0f4656aa8feb98b93a60fc23af745c8c8e70682358fa72af1. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QZFZ42022547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fdd4f8cb5c34d0e8ab82516e516e166f923be9d71643d6d46fd2e7c0c03ff7b. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/QZFZ42022548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5eb71f2c4b777f7b2d17baea8b4c46307361d8d93c9f65c42106bb0b4dc32f8. 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/QZFZ42031385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x553390bc863630f215ab4544bde8b364f50d6567195d0966077484b5f8d8405b. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T22:58:49Z), 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/QZFZ42031387.
Punk Is the Worst Form of Music, Except for All the Others
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7b7697826006dbbe8521ec335736f112b5e9e7a3f5886fa2d4634fe57d949a6. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:11:23Z), 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/QZFZ42031388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b616565a577538b118710fc3cb87024920c4a952881aead176dd4c7f0705261. 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/QZFZ42022222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84ff54cf107c62dcf7c3a326a10142eec0b36ac3c4e328d3abd3ba946c5a9c1b. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/QZFZ42022223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3c2528fff71971e94d91ae3e03431672e7556a5c69aa523193e918e86061135. 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/QZFZ42022224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb69dc9a3c3e9d794e68c53b1aa78c0e1abc0b68a3ebf29555e2c6ae8fa91a7ce. 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/QZFZ42022226.