Sourvein is an American sludge metal band that formed in Cape Fear, North Carolina during 1993. The band has released four albums, three EPs, and various 7" splits. Discography Split with Buzzoven (M
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 0x00b19a20d58863457d89c71adb800f479613a1c39ba7f6323ba8cf48a8bbca46. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a11828b8-d0c7-4099-86ab-d801e157ac27.json and https://artists.proofprofile.net/proofs/artist/a11828b8-d0c7-4099-86ab-d801e157ac27.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 0x92be64572c95db1d644cf99fb2654dcae2c1e33ac9250c1a8c3a4611d755cf34. 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/USMBR1511505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1c5707b397334ce36782d361c77056a25dcb53300d1fb343140d7c6ce972196. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USMBR1511506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d69cb7052aca0dfa2abe4e202999a4de88d43f25567b69927fbf81e880f6d58. 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/USMBR1511507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b66d3655686ed10e518b7f432c185d2d0d17bf66c23ef77246e0298c448beeb. 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/USMBR1511509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9df6eb4410f702bac82aa2b4498edd2901bf38584446f71b6ff9645bea9d6b44. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/USMBR1511510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x721655e86550c5dcf91b42774cef6e2bb430ff257fe6e89ff877af6fd902146d. 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/USMBR1511517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bae5a63759b3d852785db0787a4f589ed65533d8f9a1579f1fbd3e4724ff072. 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/USMBR1511518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa23075f8c9805918f52bcbe7a59b9fc08fb8eaf9df54a060bd8f95c80475d548. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USMBR1511508.
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 0x00c0e422b5138be4495aa01c1a0c6a8311b12116bac53979c04386324a3dc741. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/USMBR1511511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dce3708d0a70a39d255e2a2fa806a8e79a45d4ffe3bab0a1cb2b206101be5ff. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/USMBR1511512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91709beb7aa43fe354666f9237476f889aebd856a204acfcec2b9a5597d7f295. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/USMBR1511513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe292d10c80f925fb2875858a5298a140e28f4eac791ba662a86c85ac4c0fe722. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/USMBR1511514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x154e459a0a16e1a00b91d2649a35f1249de4c69d59693a414dc62b226797d7e0. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/USMBR1511515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7d9900696ae67dc00c443e08fe4dd0aaa5b9ead855afd8525f8728e92a6756d. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/USMBR1511516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46a05c3c3f6c497ac4a4803755a115410d3d8aa7c990720e336a7f8cd13f25fa. 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/GBADD1134201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4ca38c0b999d6587a2c3d4ed95f5c8a3cb1e3ba49421728ca9687cac270773c. 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/GBADD1134203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5781270d75aff1a794d6050499976732078d74f47c5150371638da4b197bbbc. 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/GBADD1134204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x722c76bd743bbd986d983a1fed7d8f5ece557e29bf7db1aea2c476d7608532fb. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/GBADD1134205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72e91de40c3847fece70ac076b6ffc1d823d5b56e2cf7d1442b4c101e1d2b89c. 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/GBADD1134206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9024bec3afa33980b24d4c69a5c7abcb9590a3943ceaf6815e103654e80f8ce8. 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/GBADD1134207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f71197de950d9d7c9db99e09eb2fe168745096b3193a01f86eeb7bd441e41bd. 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/GBADD1134210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x074fe715ab826fa98077d9f7c49ca30de756930b70c3256eb7dc7baa86663426. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/GBADD1134202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa63ac60f66df3281448ad77bc1afa371ca3d30bf0f80b5dc55902b320ecb4095. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/GBADD1134208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9d29aa7f2cca150e5840131a4670ccba3839281c663481f1e6fe08523b7466a. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/GBADD1134209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8d19faa5cc0e830455bbbed3a5330bfa8f84051b72a7e1df93777fd05d3ce80. 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/US4XR1134202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x380d3a9ad48a00253f8886498343f5ba482f3c6b866095752ce6b8009a6ac1f0. 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/US4XR1134205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdec79ada45580174c2becab64019bb14796e81ec0753f488f069c84a1c3e21a1. 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/US4XR1134206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda03aa21f2324db1fedf76a6ab0810c5246ec4a7f05f7837f238e637c12939cc. 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/US4XR1134207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68189bff46f470750a5fbca0238f2820daf58e98a4a2a5aea0c98bf5b8c84a4c. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:27:16Z), 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/US4XR1134201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31426a99d830014472c8d7f3149a34320c53c7b060f6430f60fe9034e29076d1. Chain 2 (Bitcoin): anchored in block 960210 (2026-07-30T05:21:45Z), 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/US4XR1134203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97855ac03e79795d9a59f76242e04ff262a2c9b8af340941b1c9a391ff2443f0. 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/US4XR1134204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e9574f929ed7bd8b5b61807e7bc9340a4d0aea8173672dd7cbd376339071814. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/US4XR1134208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd34e2cc7133518d8ea967ff34fa92786994d0920ab7ddf4e7652f2a8827a83a6. 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/USDBY0904615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53ca2eb3dc27a999a5a04f40e782f91cc2e08a4ae8c1fdcd5587f6617280bb9b. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/USDBY0904612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc8e6fd8a695504ad1c57cbe232337bcaa583be02be2051b32f4aaf6d33b9d94. 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/USDBY0904613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc6aa872bbb98f2c170cf37c121f5d9a774ed58625685939852ed16e626a270d. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/USDBY0904614.