Supersister is a Dutch progressive rock band formed in The Hague, Netherlands in 1968. The classic lineup consisted of Robert Jan Stips (keyboards, vocals), Sacha van Geest (flute), Marco Vrolijk (dru
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 0xa4ec9c2fef40ac156fc2a3d4a3407e905f3fc22d5ced8faac57326fab4066e5e. 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/28956c13-fc99-4c6a-9183-b1d0a80bb74c.json and https://artists.proofprofile.net/proofs/artist/28956c13-fc99-4c6a-9183-b1d0a80bb74c.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 0x1ebabf13c31c5b730f2551e5779184e335da4c605394ea26c5fd9f450c7b1509. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/NLC287000150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedd2cd2d37bafb389d87bdf4492997475642430ba4a3963841f966da8e597b10. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/NLC287000120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f21302802fe03c186e9d2f1f13c7bacbdcbdbb7b2fc0270caf878b8adb70137. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/NLC287000121.
No Tree Will Grow (On Too High A Mountain)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x222a5b28e1f7e82387157745793b6a12926f5e05190fa424b149abe442540031. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/NLA319400149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13d02bcac63145bf9d692c847ae14d5b5b2328197583f7248e7515b442446913. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/NLC691900011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28b4c7ae5c943fe28fbfead350626ac12571fa2d87489238562813e5479ecaee. 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/NLC692400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3328424fc937dec64db1ebbf1574a4c691561e5f8b4b2a1506f3474c26cb143b. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/NLC692500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6172e82cd9488fdf825b59068a3b141e5740bb5ce60b3a34a509b0c46f4a681. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/NLC692500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3328424fc937dec64db1ebbf1574a4c691561e5f8b4b2a1506f3474c26cb143b. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/NLC692500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd25e238a9d97a466ba2e602636295b19394ee7911f40ae6b7b94e7907835272. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:32:27Z), 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/NLC692500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30d532691ce24c4b68069c1348f9812b4a5bfb506b05020ba9bb210f36842ca0. 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/NLC692500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ffc14bff0d4d9c26fa383a6338b2403f2fdcb4c58530402db814ff81a19d8e3. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/NLC692500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c7915703c5acd453b5f9b250c888534e8c810e6d1f77021f90c7152397382d1. 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/NLC692500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55ccdbaadbca6dcf7b052faf2f5aff2616e9a48d416168b9e4dbe31938f483b2. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:24:34Z), 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/NLC692500012.