Gulfer was a Canadian rock band from Montreal, Quebec, Canada. They formed in 2011 and were composed of David Mitchell (bass/vocals), Vincent Ford (vocals/guitar), Joe Therriault (guitar/vocals), and
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 0x2a86aa45c5e63341ff748c6ae5af7191c6b94d84a72b698b25b710023953c0fa. 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/d0d23df7-41af-428d-9041-c564bc31a63e.json and https://artists.proofprofile.net/proofs/artist/d0d23df7-41af-428d-9041-c564bc31a63e.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 0x9e584bc227c13d0c77811fa1b31e313c0c5d5b07e2cccbc6efac8aaeb96ad406. 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/QMDA61803103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fef0403bb9e8583495d8412d02414dadbc82f1fc9a37a76843d8ba252fea2d9. 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/QMDA61803102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16547d1294177a2004fda7861cd357eeb9558e8c66706305d21bb0b08ffb5e91. 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/QMDA61803105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23107a875a1f45eaf900d0bd40856f9a835e1a6ac0ad2638b23003f7f2059e44. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QMDA61803109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bd46b50da0423d4df94da00815234bd8f37df1cbd97c8361b1084d62a97d83c. Chain 2 (Bitcoin): anchored in block 957735 (2026-07-12T17:47:43Z), 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/USEZ62022306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9cdfbc8661f39a9a10e59917957dc54f664ab14f8e8dd7ba74c6b1d4e8b6aac. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/USEZ62123201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe0080262647db577735fcfc0a2f8038c188ce09b046b8b8317737388ff200de. 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/USEZ62124401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcad216431b73861db3c000e261a9206fdc678a4e14dea6ce2641cd8f856c6952. 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/USEZ62426801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7b9eabd70fd9699f5f00960cc55eb6c841208f4b08f5b07b3cb5f6c8822a0d3. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T13:01:04Z), 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/USEZ62426802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eacdaaee610541e8c1806cfa6eb6412a34e9da68d4ad188c2d48c828eda9fd9. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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/USEZ62426803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30c8a83324b458eb2989ab2e6d4d4c09b4c9f8b254d8a19d058b97d5e0d3beb0. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USEZ62426808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x853e42d1342cf98688ae6d815ca9fe6fcbd89d547995905737e4e10355c82c3c. 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/USEZ62428201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb89e9141cbae4e2dbfb0d52334414e33eb1665e12f8190b69ad90cbe3a04cf0c. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/USEZ62428202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6900230eff5f3b8e14da67c63ab2c86f5b055cfaab445bfd08310dd16d49f7e3. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/USEZ62428203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x671227b2e5b0a0c6b2ccb5175a7e1d933b9d84c10eceaf147b49391ff5d497e1. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/USEZ62428204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a3477a423f14b43c6791de22af4f6a5a44b160e262710ff6718f0d03c6b6248. 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/USEZ62428205.