Tim Waurick is a barbershop tenor singer and coach for various barbershop choruses and quartets. Waurick creates learning tracks – recordings in which one part is dominant and the others are sung soft
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 0x3a49b83cdafddc3ed3787f9e61f298459c87a605b0c3537690df5bd17c3fa902. Chain 2 (Bitcoin): anchored in block 953808 (2026-06-15T16:45:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ee253b46-8a08-4065-8ec7-928ff822924e.json and https://artists.proofprofile.net/proofs/artist/ee253b46-8a08-4065-8ec7-928ff822924e.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 0xe226490c6ef752a7ea536014f49eed3528979e190c8fdb19cbe36adce637177b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/TCAGW2394747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3236c7afb04e2cf961ba2865fceb37b7d3b599f5fc569f246c6e6c5800de97c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/TCAGW2394758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc841ec6a4d79812f050a982210785fe01d3da80bc164fc451c4915c13fdd56b6. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TCAGW2394768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x660c17a866e651b3d617554c7b4843d522d67aad5914c0940ff7b7286df2081a. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/TCAGW2394777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x229e83b7509043b148ffc314a7a8b818991837a3db743851c0c13f7a41dc57eb. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TCAGW2394779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f864c3ba278da781f8879dc88cff8cead78fb88d37f44479320b34ef34b8e8a. 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/TCAGW2394783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc58e12426624f46c788660ae0dcd89344762d15cd118dd6aebcda5b84787c195. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/TCAGW2394786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd31d684c30d7eee77f7aa33aa513ec8d39ef4523a2cfa39dda64d7f6f78fe621. 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/TCAGW2394787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8c83bb33663c85d7b3cb73411b00682f6425b0fa613662bbb3b5fee1b150d3d. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TCAGW2394795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc21941215c14f6ecf63f3a122c8657263dd5ae25a89a7eb5e2b966926df8ff8b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TCAGW2394813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52173480005d2e1b372ef2ca77f6f54583144f058b040984c0f9d3ea77a89b00. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/TCAGW2394752.
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 0x4177e6c0c61b6e6b557483c0614b842bfd9d9ff61b706b5905ca15a370a76ac1. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/TCAGW2394793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62513bf6be9e64f8a3d1eef573fc036884d259d1b49314e88549acc6459bc60b. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/TCAGW2394805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x119d97431d9cd7d098193a0bf82d16e0d0238011023db3deca615b241e6240b8. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/TCAGW2394933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dcfdf8f746f6dfd09b37b4a8f5efc6eb39a435eab0b119ce9bb2e6eb5d679fc. 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/TCAGW2395114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc77c7e6397cadf5ae06107ac0cd1e8e8e85def18d60a25f918d7b06652dc056. 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/TCAGW2395242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcae33f7b487baf474b818ff909ea60ab35c6d915c359cef18eec1e3cb1e6a824. 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/TCAGW2395246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa789a3273caf9a5f11245b2ef8851d9811bea9f78dc327adeae1c422e4a59813. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T15:55:52Z), 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/TCAGW2395267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x764b750d4183866231e57eac6348768acc44b1968bc45e6791ff2e928cf90dba. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T15:55:22Z), 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/TCAGW2395305.