Hank Cramer is an American folk singer from the Pacific Northwest. Biography Cramer is the son of a United States Army officer who served in the United States Army Special Forces. Cramer began singi
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 0x9a3f7d21c8b067bf406c9de4d918d0036426a2732bc3e596f90e6ed7dbfe2f1b. Chain 2 (Bitcoin): anchored in block 953812 (2026-06-15T17:06:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f6fb46b1-9a3d-44e7-ba97-2ad619b4cf3d.json and https://artists.proofprofile.net/proofs/artist/f6fb46b1-9a3d-44e7-ba97-2ad619b4cf3d.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 0xe74258310fcdf5be2f2a2a4d33c96e628cd4a7be787bc573c3060c2512abee37. 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/USA2P1683233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07f58faad97d06687ac7096ef06f32ee6314e15ccd4b295a0d1d27d26bc4859f. 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/USQY51334344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94640ad7e6a550c5b87420a932d39023009bd2382b7d45a3dcffb9168e4b34f6. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USQY51334346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbe19af5ea6ab232291d1742db7dbf28397dd424b88b086fc4141650564812f5. 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/USQY51334347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4010ddc47fc0a48610599d03a17aeefa2dfd0d2ffeea8515bc7e5aae879880d. 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/USQY51334348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43a79d05964a19d89396d62e94854ea3a173e9ac91205dab47187a79cf988e79. 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/USQY51334355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x075f39609426d515f660da5d4364a722c682aa08e0d9fc6758b4d0b07cc3054b. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/USQY51334342.
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 0x88f09404a1a62dee907640754142e8d16a8556ea65758ba5f55474018c3b3357. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/USQY51334343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x363395d31aa198b70bd5dca7832d17da45c81afe589a28d3351100bace02ffe8. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/USQY51334345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x866c28813c500a656b705330a39199e12073a4472c23f9b1a9ca869b0d9d06d7. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/USQY51334349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a6d2f5db36fca1b2e33c0455192ea14ed49ebae35dc5eb2b179e28de935a714. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/USQY51334350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f573b8891b74c79888e056a42afc73fc7b670d146fecbcdec794395c5d6aa3a. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/USQY51334351.
Hielan' Laddie / The Blue Bells of Scotland
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x058c10b849dbeee2bc1bb2480fe2fafd11e2d9094fc7fa17c473246689f31ca5. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/USQY51334352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf26378cd8d89cb33a75b2c9cf6829574ed956295f69c5f9ffcd74c6d31654f9c. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/USQY51334353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x184f076d5f01311373fa0ffd1375454d8ae41604eb795e6f61d3c044311832dd. 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/USQY51334354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf096e7a4bda19bb29e9732d9f03b8f1f2752926b64b9b5c69c44b9a2a6f6d30f. 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/USQY51717100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x418a25d165f117c18b3d46418ba1b0d40ffc31fe40fd9bfe6db09a6118b57797. 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/USQY51717102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bc244f6d85d1116d9dd6f6e4aac26d674dde62ae4ab7bb356e2bfae599a4bd3. 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/USQY51717112.
An Old Striped Shirt: Songs I Learned from the Kingston Trio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a279e7dd9a09ff4fb9672683c0e48a99b267a50e0181cad405b6a6eb07d4eba. 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/USQY51254422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93fd85bf7e810173117c5c0eebc5f8435d39c6f838ab70c50dda58659e8abc42. Chain 2 (Bitcoin): anchored in block 957198 (2026-07-08T15:54:54Z), 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/USQY51254433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2b5e9fef4b55b58f46490cbfc87d4a7376895f35abbd51be44658a57fdd8011. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/USQY51254426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24959bce5e11b19959b1831d59a22dae7141d67ff454c09ff1f23b1d0796caf6. 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/USA2P1255657.
The Road to Lisdoonvarna / Drowsy Maggie
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36383e43b92c03e0e9608a3ad80d97a937de51699fe1fcdbb9e41db2ad513150. 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/USA2P1255665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57de2834ad33746500143cf06508b1b533abc25a296f0e672a58b7762592c559. 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/USA2P1648295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb054b3a44eebb697984f52800dd0693b379d7d645bf1af666e1d1af01b461c6c. 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/USA2P1648293.
Tales from the Bar: Songs of the Lower Columbia River
The Songs of Alice Winship from Land to Sea