Cancel, cancellation, or cancelled may refer to: Business Project cancellation, in government and industry Cancellation (mail), a postal marking applied to a stamp or stationery indicating the item
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 0xbee79eeeb63a0d94c62cb365d043dc010621a2d124b634fcc0d061847122b7f5. 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/a3ca83c1-8b85-4aa7-a7ed-6b365dee2f1d.json and https://artists.proofprofile.net/proofs/artist/a3ca83c1-8b85-4aa7-a7ed-6b365dee2f1d.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 0x91b8f076887831be73ef1fd1ab718c98b2bd97035c091ef865d09a65d794966c. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:42:45Z), 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/CA5KR2326068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeebbbfe69b7819886de15a704eb1bc4e54a772ccb3db874d7fa1bb8340f38ce. 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/NLG422300227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4674822588d1f72aec6b792ba4f4cdf6b5120d8fe0a35d12a91fb45c63e79ae1. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/CA5KR2486069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x504900331f92f4a21a0ad80ab4f4bba49282566af5464718bbff4563827ce8d6. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/CA5KR2490502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2575cae9bcb1f6f42f36eb585db1e76b3100040e34e38a28ea4e71503f6e430f. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/CA5KR2494945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cc5486e432bfe853351b3ddfd5cf1c19fe39acc32181c254a7fe4666934f96a. 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/CA5KR2505756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0500aed35e60846043edc604eb7478cbe26639cd9138fcaec8da53d32dfd6b84. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/CA5KR2511148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb42a2c6a2f81d449161b36edb578139d2079860863af0369146dfb9e9cd76ba9. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/CA5KR2529284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5af7a2cf95c6c508c7d747d621bfce57985373e004b526f0ba8675dac8db9249. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/CA5KR2589546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb81e5e185c0ebe2cbce999bc982e6584e55a739fb95ceaa7c329726ecc7011e. 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/NLG422200199.
She Likes When I Choke Her - Cancel Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6ebfd81a880da5f1c8d9c25866a218dc5162a78eb7a61b4206182f27686da5d. 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/NLCK42416657.