Gruntruck was an American grunge band formed in 1989 in Seattle, Washington, by vocalist Ben McMillan and drummer Norman Scott, both previously from early Seattle sound pioneers Skin Yard. While in Sk
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 0x3efd6cb6a7cd64b0451b3eec53a2496ce807c5c14d9834e2b24f6548b84446c1. 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/de87e3c8-641e-4603-b04c-da89f79a1976.json and https://artists.proofprofile.net/proofs/artist/de87e3c8-641e-4603-b04c-da89f79a1976.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 0x3c15810bf1f7ba14099b550790e34a1ce835af242a9d79c1cd5b2ba37edbcafb. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/NLA329299974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd051d87d078622b683398ed97fdf114682b822df20768ba78092a5798dfcf8c. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:09:41Z), 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/NLA329299975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeb36c3fe20f0095050a9d3003d46993fde294eb8bfac8a0ab91a5813c31f52f. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:15:16Z), 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/NLA329299972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c905fd627ce72f2a43dbd37d07173086bf73b7064504aa48bcdf7509d384001. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/NLA329299971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb81438029d99a792477152c2adc8e133c8f03c45d099a28add7568e7f4433251. 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/NLA329299970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc33e7cd813819efe563fe58deac9b88da6476de0e807b523c3f9b2873dfb0af9. 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/NLA329299969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf5efa9b2254213596e22a12642b85bf19f3b91e35ca16e8ad858de741765c36. Chain 2 (Bitcoin): anchored in block 958971 (2026-07-21T05:04:56Z), 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/NLA329299968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0c5afc1efc75e0a170a53f30061cdf2b8bef0c8a2f2a3a9a1cedf206658bb86. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/NLA329299967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x131243b1889d5ef51445b786bb7d74434cfc04dce28c5d83e01142d7aabb2cbe. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/NLA329299966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f97c6a23445cb3ec529fbd6d233a6c10c462ff8b2a742375ac836c730d944c9. 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/NLA329299990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x903392c9ffddbfec384abfdd39b7fccb2e6505fd18236fe4677bdd02a1dc39f0. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/NLA329299989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23486221178a6e9c7548c2b02dca81e927015dd86fd3a0a3032ec7951cfbea07. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:04:45Z), 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/NLA329299988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9e6e74344bf9f1e1476ac44d55aee801683c83adb6d49e0e490e4e5158f565d. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/NLA329299986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d4d5045c5165e9ee1d948ed4df6fcfab6686259fc0e3eb6f6baa88d5c488ca0. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/NLA329299985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81cc3f8f273961a6bba93c20334b6ebcbb22e6c08dee811c945d64886f314280. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T05:06:08Z), 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/USHM21791088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c15810bf1f7ba14099b550790e34a1ce835af242a9d79c1cd5b2ba37edbcafb. 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/NLA329299974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x902e51ade7713ba9aec55055cbb46e287dca58e50e6c8bd270e8f15db1ef556a. 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/NLA329299984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb81438029d99a792477152c2adc8e133c8f03c45d099a28add7568e7f4433251. 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/NLA329299970.