Hunters & Collectors are an Australian rock band from Melbourne, formed in 1981. Fronted by founding member, singer-songwriter and guitarist Mark Seymour, the band's other mainstays are John Archer on
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 0xe7e658c928d0967d280600fa6a4cae124cdeab9827f91332ff980368cd12c210. 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/b192bdaa-33ef-4045-8fdd-da7a89ad1e59.json and https://artists.proofprofile.net/proofs/artist/b192bdaa-33ef-4045-8fdd-da7a89ad1e59.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Crucible - The Songs of Hunters & Collectors
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 0xb5f3d2e68a532b20d70b78a926546426136749b8a23ae0e3d479b9112f50087b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/AULI01387660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f098e45773caa6df6ddc9fa5dde5f5e96089f8fbb6ec70566d479c810bebe48. 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/AULI01387670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe2de9263a5a87332ddd8d6a71eab3f3a5c7b6beda340835e59084ee84f210fd. 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/AULI01387720.
Stalking to a Stranger - Planets Collide Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d0735df707a93a1c4c2bc06b3cebc1d153213974485996450b12ded67cc53c5. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/AULI01387790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x940844d1a3ccf01bb1fef7f559e258607b7c5b0d65c80b35819447cd38450c23. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/AULI00508340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x145c12f14b46e6164f0b3506bda26133ec987a27b49d047dbad17e7645bb78ae. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/AULI00508760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58a1b68c634f3e835790d7b5e79f636cfeb1ba91128cb9c22d359e2050d476e6. 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/AULI09800570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fc2cf99cb78e017db549946da9c6cbdfa228d75d0d4f2966ecf08f8695bd8f4. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/AULI00508470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc03d6839f4c5b1dfd62db2bc7398a2fc08f6ec643fbe07c51da828b1d0c32204. 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/AULI00508330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x940844d1a3ccf01bb1fef7f559e258607b7c5b0d65c80b35819447cd38450c23. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/AULI00508340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2acb463e73bc92f7b28423a23a3ce00990e512a617e1c153726228baf19f9b3. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/AULI00300680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe7065a9c0daf278455c10b98d9db1a405be4931b52d59b1521331cfe22aa318. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/AULI00300690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x680c7a3e2c17cee93fb6880051bb1ca63958cde8e14eb3885f2b1eb1257d45ec. 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/AULI00300700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fb8a2003ea6bb2deac32aea5ac9c4698aa7422497b174c0725e7149301d3fbc. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/AULI00300710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea48e1ecfe08f48ec2fa201c4ba05fd065ff2b1709ed2ff619a75607d4644b08. 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/AULI00300720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ce0199de34c7d9e477154b5021c7a91735a6a43a13cfb82ba3977d6773f4754. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/AULI00300740.