Tanz is the second recording by American guitarist Tim Sparks on the Tzadik Records label, released in 2000. The word () is Yiddish for dance, cognate to the German word with the same meaning. Hist
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 0x92b2b9668c50b2f6d1de7fa3e4cc54840b35740691b40ad018c7114bda6a42c6. 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/c0303b35-b540-4ee8-800d-79cbfc5ca6cb.json and https://artists.proofprofile.net/proofs/artist/c0303b35-b540-4ee8-800d-79cbfc5ca6cb.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 0xb3930c98b0258163d6d49e6bc828c5f313b2bcc0823a8ce38118e02d05f637af. Chain 2 (Bitcoin): anchored in block 960330 (2026-07-31T00:58:21Z), 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/QZNWR2499778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05628f52ac6e0bfa1ea52d12183662d778a51d75860f733fcef7b6e9c3d3379c. 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/QZMEP2210845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef32c67fe5c6f8d3c22e37cca9d2d429d249542eba589bc53c109be329f41c5c. 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/GB8KE2200679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x411f0b38790cb5d58d0a1ef203ff830a6f44f2e2c8739f482d35df938b869aca. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/QZES62204561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x679d27bd53d58d4551aa51a2f29a63a4b5b82c0443cbfb1d1785faaa28cb73d1. 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/QZHN42133987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4574cb2abbe9bff7e75feff1fe1a48223e6f6c645e3d47b3ed562112148c6cda. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/GB8KE2057092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6cc73bd5f9cc237a4965cbf29330eb6cfe8854b9407753083f05dfa709a10c0. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZK6Q2094375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a3108708c630a87310ab397cf10b0cc928295ad65a90cde508bda36fec55628. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/GB8KE2052936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d1266d0e5e4946e6ffe549b64327977a22eb624d538c65ae9c2b15420f9be0e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GB8KE2200676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e354f04c6b1fd8957f84c556aa20928c7ee7d19f3fcf4c2c79a7ef51826ebba. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GB8KE2161101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaf6dda3b49920021cc0dbae4f47596bbc657a475b3e6871275389fa58592b1d. 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/GB8KE2150731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e7909c9d3edcfdfa3e3a2c304cf0d21f1d75083244e67a1a08a07c03e1c99e8. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/GB8KE2200680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e354f04c6b1fd8957f84c556aa20928c7ee7d19f3fcf4c2c79a7ef51826ebba. 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/GB8KE2161101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef32c67fe5c6f8d3c22e37cca9d2d429d249542eba589bc53c109be329f41c5c. 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/GB8KE2200679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d1266d0e5e4946e6ffe549b64327977a22eb624d538c65ae9c2b15420f9be0e. 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/GB8KE2200676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd459a9b77cb59af8b2b35bcf8fa0f04d872992854f7584e36224c67a3ac7404c. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/GB8KE2200677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e7909c9d3edcfdfa3e3a2c304cf0d21f1d75083244e67a1a08a07c03e1c99e8. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/GB8KE2200680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84c32a5baf2885fe925de24cefabe4eba5b2e6dccac243fde9b815f61e48334a. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/GB8KE2200681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x458f51fbf668dff02f7f6f9d216f161c0361d3354e278b9c8387112d37c1359b. 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/GB8KE2200682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cff857903244804325a9078f17e0e03ab28f3ba7e756890ad483c92cd61322e. 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/QZFZ42244707.