Betzefer () was an Israeli groove metal band originating from Maccabim-Re'ut. The band was formed up in 1998 and was signed to Roadrunner Records from 2005 to 2007. Betzefer is notable for becoming Is
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 0x4a44e36ba83c54e73c5b4dbae4f757ed3113d967e83d62e85a603adffec9b70d. 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/72cc1865-e79c-4544-9a72-e6f0aec70d9a.json and https://artists.proofprofile.net/proofs/artist/72cc1865-e79c-4544-9a72-e6f0aec70d9a.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 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 0x01d1f9cc206fe72d51e9a6f7b9fada3a60a001b03b96f1a4f931e489112d2e51. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/NLA320581040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeda86c084c6fbe867180a7380ed5a796d248874a190459a6affd026fdf81eea. 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/NLA320581041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc74afce1c7a533cc9bf1dbffc28a1b98a646ba728774c992f4adcc9c0741301. 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/NLA320581042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ad30ec85ddb0521fc94f5e0813d51dd12c76c53b58322c85bf933b137013845. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/NLA320581043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ee18097724d49104a4d901cbc866993cb2230e2043819043cb081011ab7368e. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/NLA320581044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63309cfbdc138c57e428327cb49786ff55a32d19199f8c11eeb4917d94545914. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/DEU601103264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x797b45a6976612b7cb46556d4f6e4daa0f2aae49faba925e3b55813c76626734. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DEA451309080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f26fd3e3f1051ae2d5b46120408ac07c7292806704262e6465edad0cc386563. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/DEA451309100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab6b63845b293f26f1cf1be5555d0cab9ff95fb8e2a1bc94cdd66276a91df62c. 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/DEA451309120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8370ba5b48c9824add467bdd5c45d65ed1af0417dcbc33ef0502e586861ae67a. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/DEA451309130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2701fd4d9e19d565054eb69d7467cab517878e1f507fc56c66b978ec89083869. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/DEA451309140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7ac99327432c392d32f6b4b66f8741630e3ee83bca094d7b1d705096e37130c. 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/DEA451309150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0b22f4226006238a94af71f82d26750f63e2cb8ad49fe5f211b0cdd96f0a96d. 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/DEA451309160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86d3e5b3570591124a1e5ac5c2ec1b2f6bef8ca1919c695eeb5fd171f26ccf44. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/DEA451309190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7719c11aef94143fe14f0b64c476f4e6c634ea690949a4d4b408da245b2cb61. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/TCADP1803540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dbc7bf6c5c41f0b649573e7a9b1624f69ac2fba482d7687b282b6af18089e2d. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCADP1803545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x927e19002beda3e20975fab23914ddb9a13753cd82e7aa7223435cb8fb52a81b. 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/TCADP1803546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2767652ce6a78b85a61a5d48cb13378e912491218fcaa12e2f2751412fd6dbe9. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCADP1803554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f998c8bb9728f556d6891c2a83516780b90d35cefc83fbbfe66a14a7a6e575f. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/DEQ021803340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb498279a39a31355f799eada6037853487ded268492260ca21340d19f5057f0f. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/DEQ021803341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2231a20a8030c8baa70fc127991807e7168aee9cedbd70a5f78151de78bdef9e. 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/DEQ021803342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1983a26cc12ed0ca0d6569a06496e52a324154002acc942f6b59f79c25b69e5d. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/DEQ021803348.
Freedom to the Slave Makers (Alternate Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdef4c904c03d2c541e61ccb5b677c3855a84e0bfd268bc74eeb540e566071814. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/TCAHH2349015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe70bb5997c8b3f106fd809f7bc2a83db3f811d139118bc645b827fc09a39bdfa. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/TCAHI2341828.