A mountain man is an explorer who lives in the wilderness and makes his living from hunting, fishing and trapping. Mountain men were most common in the North American Rocky Mountains from about 1810 t
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 0x236533f219cb6f2e9ecbff86fcb72b4c7128767d31b9e36d4f20b06417f7804a. 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/223de89a-6272-4e33-a9cc-61ac05032d1f.json and https://artists.proofprofile.net/proofs/artist/223de89a-6272-4e33-a9cc-61ac05032d1f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Made The Harbor (10th Anniversary Edition)
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 0x805c9badda6a9595c88ff03714daecef757172865f4ed25724b49f003456f995. 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/USBQU1000044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe355a17b8c3218d70ab113159f4af502022566486f8ec2f1b3a72c8e1c6e2a98. 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/USBQU1000045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50db5ac1318b7f5d6de5c44829230bd1bc8698a029a7e94f52982c776766ef42. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USBQU1000046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d22bf7ebbc56d179aaf0191dcdbe33b632555e2101429ba971ff96e68d35243. 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/USBQU1000049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f8398afd83a8ec9cb1c9ef719c0931d8ce9d9574798a05fc7273a4b4ff43229. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USBQU1000052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bccdae539e6126fe6cdada871a8c1b07aa4e274d47ecf4462c2145e12557b67. 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/USNO11800386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ebe47122e265353db023f1234203e36cb89db872b074849225851ee5afada61. 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/USNO11800387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc2e68837012e7e7b09bfd7ff6934962393a6fe0ce7d39b62dd20ee8179d92c9. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/USNO11800388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a87f52e1a60d5197438d11e87e318956d10a07c0ce45aeec39f21e3c916a24e. 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/USNO11800389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0df1ee97f019024cfd6cb18b92612d294d1fe8740f3e4a03b90b2f7d2b595184. 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/USNO11800391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfa99ae6024cce0e5b353ba873cf4fc6d3f06675130ff50fc56df6d9de2a87e9. 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/USNO11800396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0527f35cd68184f847609913628eef21eb6610c52e888d90905145859154b77. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/GBBRP2000119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77e4a445cbdc0ac0f5baddc2b7749b3f2c4c0047e17b04d7e88f57a85a194291. 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/GBBRP2000020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x868d5a9dcca57c07a0839b485603d9402f75b119d95fb1e6c2599e3f8b394f6d. 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/GBBRP1910101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9ea24d0ba5696f6af6009bd8f39cc3579f31fb7f33ba66dfeabb4b56c1e9688. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USNO11900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x561992dad5207f7e381f2eb4f8a1abafb536b2910711cb98e6bd05ae16fa0877. 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/TCADT1816108.