A hulder (or huldra) is a seductive forest creature found in Scandinavian folklore. Her name derives from a root meaning "covered" or "secret". In Norwegian folklore, she is known as huldra ("the [arc
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 0xfb82dfaa1d9641f4c3469ffafda82441eb40dcc841b8a756147153a5a8987eb5. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dc212ff1-fd6a-4f39-a5a7-61cd0c72dbb8.json and https://artists.proofprofile.net/proofs/artist/dc212ff1-fd6a-4f39-a5a7-61cd0c72dbb8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
De Oproeping Van Middeleeuwse Duisternis
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 0x6f7b05f1b2cd84d3cea6ec3c2f3722679adbad23ed786e9ef9b5a75f6766620f. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USHM81952310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3cb49a364ca0ecea3efe4071cf83bf99aaaee1fb590083cebd3531346547b4e. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/USHM81952311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f8d29aef2920615f30cef2e8f6194bd81f174d3488e5536257d0c9d7dde1c56. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/USHM81952312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3366d380f7ea397bcdc34c3c82b26467881ac7a96ad834e6b9aa579d9c38a9fb. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:02:55Z), 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/USHM81952313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d4fe1b3219302f94f5e91bf66fed066b2122d715dcc9bff399f21164d380c2c. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/USHM81952314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x823044583795a60c3d76d2956efd27882f6f425b67b4cfefdda6fea38021e65c. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USHM81952315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0709e3daf3b0805972469c2ba68b87b74341d0900468068eb25ec2a8bc45aaa5. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/USHM81952317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa37a699b5f75e03b5d6e0e93e41652ffbeff04053624389ace2e1fb9c7b1447c. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/USCGH2018845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe2784891b317a4e2f216ffbbc990a02c2172a9bd6205ffd91a1a44a828066eb. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USCGH2018846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x284d4c019e3f8aefa1758d51cf72c874af82fba03269fa1d4b6d7490ac4f5a83. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T17:39:36Z), 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/USCGJ2099764.
Godslastering: Hymns of a Forlorn Peasantry
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2857a0d8960eb84c376f8c85a07f7b59daf64ff90fbb8a58895148fd972148e0. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-17T03:23:51Z), 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/USCGH2136915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e7f48c37f5d231a44e23b96b7db48e0dd0f497e22fb191ebae9c9643480a605. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USCGH2136916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16b8b4e359805b67a3d39373202864507133a65bbc445b6ba2552fe03395f1ee. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/USCGH2136917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6e7ec9775832b88df6b4a2a90d9656b5faf391f82b1dbd1ac90af349e7f7a6f. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USCGH2136918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35eba7489dea0c25795a5794a6bffb244b6bef01d7798d8424ea3638adec4e44. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/USCGH2136919.
From Whence and Ancient Evil Once Reigned
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0929006df8039ac226feadf64f8e1f2235665595de99fa7f776de0beffc16d27. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/USCGH2136920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1b2ea80d0de5b8affb4e39ff3fd2c31b05d1d2b9ce0506c1b84b9b0cdcfe074. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USJE72215702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29e6d05058a9ad09db649013636354224b5c3a18d9a022df3cf54ed76ff6ff2a. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/USJE72418701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57f647778581e144c1e65c43834067dc56f641393b9e48e6574c62f9170432e3. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/USJE72418704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa911f3e129405dd1f0f0c084b1b48b4e89c151dbc880381ad81c07e9a669f40. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:19:39Z), 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/USJE72418705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x017ad21dcfe7a60a1af25a5e001e9fddeee6bcd97bd936ba12bcefb9cb41f308. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:08:04Z), 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/USJE72418706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c7481521784e180766c9b70be930d5b94f7d331b3cd66807fc0954e36861bf4. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USJE72418707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x874abdaeb275693cd97f25ec4e6d253f70f86c5453f9e0ff5f8e9315e687c623. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T18:53:17Z), 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/USJE72418708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eb30a198ec88802123fca9da3d4f6997623f696d5b0805b4c8f12841dbe510e. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/USJE72418709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x643338598cb8df929b8488150c4758780fc08131cdada6952d642c7104bc1b4b. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/USJE72418710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29e6d05058a9ad09db649013636354224b5c3a18d9a022df3cf54ed76ff6ff2a. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/USJE72418701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9636e431f950d082a12eef505b80de6cb4b7f2a00a4de05f315cd9f897af9a5e. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/USJE72418702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57f647778581e144c1e65c43834067dc56f641393b9e48e6574c62f9170432e3. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/USJE72418704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa911f3e129405dd1f0f0c084b1b48b4e89c151dbc880381ad81c07e9a669f40. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T08:54:37Z), 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/USJE72418705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x017ad21dcfe7a60a1af25a5e001e9fddeee6bcd97bd936ba12bcefb9cb41f308. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:33:33Z), 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/USJE72418706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c7481521784e180766c9b70be930d5b94f7d331b3cd66807fc0954e36861bf4. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USJE72418707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eb30a198ec88802123fca9da3d4f6997623f696d5b0805b4c8f12841dbe510e. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USJE72418709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x643338598cb8df929b8488150c4758780fc08131cdada6952d642c7104bc1b4b. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/USJE72418710.