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 0xfb5b6872eba9d3e60812908c371b6b59db0da463d7be5d9f3139db3478267f32. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/64b0449c-8a03-4e44-9c0a-2f6966361234.json and https://artists.proofprofile.net/proofs/artist/64b0449c-8a03-4e44-9c0a-2f6966361234.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 0x634c8230a2de876744c0aa730ce66a95d388f7ce23740492c15d7dd069c12370. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USETB2100133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa977950f710ac199f140cb6aa033ccdcd011c93d029dc4675770a14b72ee0bc8. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/USETB2100147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29992481b0d1c6b95425a99ace1cfa33747beff94494a0e9b2db4323b1fcfaea. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/QMYRQ1200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb97613c07d2a76a858cc35bdded8b003319a4e0b55ffb656cbe7cc22838785f. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/QMYRQ1200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa24d3d0add39de77e8ce0f816b6c326e88ec0ce7da23ba8ab69a8b6a62e6fe6b. 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/QMYRQ1200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f5902118f0354576b70a2bff5c3e4cc84ab54c9fa052c000e1e81759a10f74d. 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/QMYRQ1200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c13a83cb43bfe497411ef0bfe64b3436124afb452391565d127f80a1327b7cc. 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/QMYRQ1200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb10243f6e662f18d45fb1153d9bf702a71c96d38d198625b3bd2429deb20037d. 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/QMYRQ1200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c2386a6d7b39c7d1152a1fcc198ea255f144747c302a91153e47319d669d891. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/QMYRQ1200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dcd95fe6e445b71176592075730a599e7eb9d1433c10049000725ad9ab95029. 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/QMYRQ1200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f3d57f13c6f2c4b0827471f5869d49f7ad118587c564b7d97db3a4716aacb71. 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/QMYRQ1100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78862e38acfa5b07c70f7b1f82ccf5706ea8c819154af1e7c88c9d2a7e859b68. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/QMYRQ2200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x652bf39564722f4d0c7c401ebb242803f6f4b8eea346a07f3aa5e6e9a90f69f6. 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/QZRP52376602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9261782a9e9643bcff740b0aecaed160d3513fdf83ebdd5283d990d5637be16a. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZTB72310937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0983469f430044eb19a2faf2cd5540b999b3905a1bd64e23da99dfb6dfa7c1ca. 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/QZTB72310938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0bb430abe9112019e3baf46ccc5b5f68cd70fcb43f0512e89608256436d4390. 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/QZTB72310939.
Southern Filibuster: A Tribute To Tut Taylor
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed20e28e5c0353ec150cec36567465d1de70978f1e6426b5dfd3104990882dcc. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/USKO11000861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x485820c6dac3b57a892e7c29add30882bd22456f950cc551eedd7e9773a75ea5. 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/USKO11000863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30c694559b2720a5ebfac44d611f15dce96a581aa587339bfb1711aa669b66c6. Chain 2 (Bitcoin): anchored in block 960387 (2026-07-31T10:06:30Z), 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/USKO11000864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefa507cbedd9a6741bdcdadc071248f3bbf72ea37087be15d2d56801180769a8. 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/USKO11000871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cd470ea7a03af5531913ad37f1176d1f45c065703ba5b71e257dd0adc7d2919. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/INO132101849.