Sax or SAX may refer to: Saxophone (or sax), a family of woodwind instruments People Adolphe Sax, inventor of the saxophone Oett M. Mallard (1915–1986), also known as Sax Mallard, Chicago-based j
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 0xfb671e6cbd4a0786f1f813082e95a967007442a38fcf467e420e4bb764536c70. 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/53b307f7-9ada-4ed4-80a8-15a939748082.json and https://artists.proofprofile.net/proofs/artist/53b307f7-9ada-4ed4-80a8-15a939748082.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 0xec8b515555ecd333a4e7f006f246d8aa64eef67e20ea0a80cecd5211d47992f0. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZ8LD1922916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11c0e0e2eae6fcbb89687de75e58428054a5145c7adc6d8ecb0d14c38b9dfab3. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QZ8LD1922917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd639f7595964a78ede0c1903e462f85ce940f10eff62c7ce674e5412be868d4. 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/QZ8LD1922920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a0055da378949cb10f6953d480e90e52a19b383c56a3f544db7914eba1996cb. 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/QZ8LD1922922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa30e7af76b1829ba9ab481ea1ad4a8496a78207f729186c3fbda77df49a674d5. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZ8LD1922924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87af5f90ceb33f344434d5c90f5388e24571daf641b0c75695f657f11d6dc083. 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/QZ8LD1922925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfad38e864d4e328548ac91f9c76d51b956e2f0c940744a70da333a3830d34f9. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/CZA163357423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f5e1650fb9d43aee8d7b61b856fac30d1d609228c18c826346e7e5df631fddf. 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/CZA163357424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d94f7f7d2bcec76dea68466fb277078b7d8fba3ac59555fb5d3d892b0c956a4. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/CZA163357426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85cd8352e9998d2e1eef735454cd0712ae7c994eec4cfd401e034f0da7478811. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/QZK6F2064099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ce522377ccd3a032868fd4fac2159585d31bd769421e02caedea07d6bba0fe5. 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/QZK6F2064100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b0b90fcd40d0c2d1c502b698e3ba61e608f0bfa04ed6328c19c7602278d2200. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZK6F2064101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x039f316a4fff6bf25121ea4e51ab3cb02a3faa594c93bb356f761219802aed80. 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/QZK6F2064102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26617eb62e0349168aab81bcfd88971a243c39259b3e24ce7623463f2def6b9c. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QZK6F2064103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dd804298b828e78df2970d9de0f31034f19ab18cec4e0713d655379bcc6f75f. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/QZK6F2064104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92dd5d1d7db783989f4c2c4deb6549c1cedf147101510f7270a5437da6335a9d. 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/QZK6F2064105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5f130b9657d514e4ff2fb4e894b8e415ad8a009fa0d9ea749e51bb1697c6114. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZFZ72269801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x602c0eed37c5dc624589db3e57c1a40c2fd48df034dea8d928435e160f4ea5ce. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CZA232001330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06598c1d73c0b14c2de6b7f944793ebaacc502f5a5b83f0053b5def0f843a988. 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/QZFZ22338111.
Zmrd jí sluší (feat. Sax, Fosco Alma, Digit)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f12c0f8becc337d48367a873281d7a10c850bdb2104805ae0ccf9dc778c9574. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/CZA232400253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacc7af39760fc7594edb1268d5c8e96d3606fdb06b1d03af1f86073e5f7f021d. 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/CZA232201217.