Severed Heads were an Australian electronic music group founded in 1979 as Mr and Mrs No Smoking Sign. The original members were Richard Fielding and Andrew Wright, who were soon joined by Tom Ellard.
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 0x42d127559896fd1785ca0f1ab1a617033c869a168c3822f7feea4a4ad3ae4874. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ad8ee146-866b-4556-a1f5-5bb38cdcf5e6.json and https://artists.proofprofile.net/proofs/artist/ad8ee146-866b-4556-a1f5-5bb38cdcf5e6.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 0x6cb416759f518ddda85723d365add0473fed69f3595114307506d4710beffe32. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/QM4DW1601294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdecc4d200797030645f4770096e60e037bc11e62a8207595bdacad96380bc85. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:51:07Z), 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/QM4DW1601296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccd7b0c753648916598c70d15c0d735bdb4305f4a4c16e482263bb6f509cedc4. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/QM2PV1615324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf8f7d4d2f8b13bfa2a1d40b00d8cfa390e07d70198426e67a6a3bc153763537. 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/QM2PV1615327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c84bfa7b3e69fb0b75e39cf85f011b21ff4725d5a382e78ea26073bab9e14b0. 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/QM2PV1620677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc4f6a87069a862bcf095737e024bb9d1d36dd841ba7cdc633d9ab0679a224ed. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:21:00Z), 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/QM2PV1620680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aaa7e6de554ce00d68b1973650159a908a80b7f59bf4a81c67e2107da9253a7. 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/QM2PV1620681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30e4d3dd47aaef2edba4156a33bcb642d405cd03f823dac8d15a36204a24aa77. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QMPKX1672970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e21685ce640f0d4ccbf7327a3927962a3ea3c6b2b2e74ab9742920dcbfd28a1. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/QMPKX1672978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9003e232c0763b5af114559cad0b72b1731e45c5b4d54cfda08dba34f5dbfcc. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/QM2PV1614176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeddae2e4f1f71aeebb15066c31516948bf6e8cdb0bc910ea77dd4a50c0900269. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:47:51Z), 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/QM2PV1614178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bc92fb9bfae90861f8617c9a41e364fbc4335cb308f4d6b9621b414ccb33d61. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/QZHN32265585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc736fdcabaaeef0bbb5482e0b5e98da11d3e7fa1e20a85b88f8aa4fc1b0a5bf7. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T21:05:08Z), 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/QZCE61870852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0bed40a236ca6f4917182cac44b0762d84ecffdfb2b50bbc28b07f75bcadfd8. 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/USQY51728378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6591b5efb5afa8344f1cbef2cd555a150ea86e26fd4fec6a613012ef75df562. 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/USQY51728379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1d181915bf32663887cd1ecb4d3a4ea8d0b375339744d732da6884e9e8617d5. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/USQY51728380.
Clifford Darling, Please Don't Live in the Past
We Have Come to Bless the House (Marcel Dettmann Edit)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f4c0e431a7f1794626d8f04bd9e639144142754bc33b7303c15c242844ca405. 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/DEG931801432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe79a40240c66270bb968f00bf635404ad903d92068e67da27dd6064deee6a6a5. 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/DEG931801441.