Kristoffer Kristofferson (June 22, 1936 – September 28, 2024) was an American musician and actor. He was a pioneering figure in the outlaw country movement of the 1970s, moving away from the polished
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 0xc31dee9ae9c4f7b318c083e7d7f3675aa2e709c31d8a0ecc036aaf655470a227. 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/f35f7aba-8d2b-485a-bb20-556d2c4d0a4d.json and https://artists.proofprofile.net/proofs/artist/f35f7aba-8d2b-485a-bb20-556d2c4d0a4d.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 0xd567135c931aa1042dc84bd10db5155dae82a1001e2efff3e0b4c5baa62abf66. 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/GBHQK1900131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96321ead336ed523590312443023c35c249f893d4197e0ea49904a341c6894bd. 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/GBHQK1900135.
Sunday Morning Coming Down / Pilgrim - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ec539cab4b060fb3945695d717c5a25d65c7bd290b651027a0f09cb0f59950b. 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/GBHQK1900137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fdd4a6f7b4f1a76f245b8e1d4e58fbc506f2066fe9a1a6747dd11d9edd45b56. 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/GBHQK1900143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a37552df484c64c72c2ee60a7f0e710ff84483e1cf6e88afde03a28a2530dd7. 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/GBHQK1900155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb81011057a01301c676cf68b33f7977746ebd3a12e5eddbb3073e87f83d8ed81. 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/GBHQK1900158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x429ffe16efd358b9a627c5611546cda4811009148e4977f2c4e5995427faf460. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/GBHQK1900133.
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 0x27f0c8cc56f74e3bd4a32f26686d1f88bbd2f503b3440ec6b5c6d66e822c4ea6. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/GBHQK1900157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b8d325848e4df592f4ada9d29f5797a5c39a460432a57952df2f75f2e640f37. 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/USSM10111559.
Roll Me Up and Smoke Me When I Die - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49d2f7c4312aa560d885a6b0df291f6c5ca36359b581f588047f4360218e83d4. 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/QZ7KM2000069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd8ac7d6370bc4e8470391db43d713fd5d61f0e5b245b3e6b1c54a5d35ca1de7. 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/USSM10001382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9655f6590da0cde77f4d12f3915dcfae4c2fce93e22dfb807fdb607fcff0f436. 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/USCN11000092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2562d68e1a5c3b2b1445d6ab8fa32b6d7147bbf9a1d17932f6d30e0a6b0570a2. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USSM10016815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa96de686d9397d2984a95b998aac304ed76190305691f134414efae9de3b85ed. 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/USSM10314812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1e9d22b5302403f693f50728270e3fd3ea0515d3b4a50b543142af5682dafad. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/USRH11603937.