right|96px|A dele. A dele or deleatur (, ) is an obelism (a proofreading symbol) used to mark something for deletion. Name Dele, the more common term in modern American English (sometimes used as a v
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 0x69e17aaa92a0fdc9cc8a62a46c27a13b9a7ca296a135235283b55f9422fc05c9. 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/f4fdfe2f-68e2-4c95-b20a-3e32be8e8c6c.json and https://artists.proofprofile.net/proofs/artist/f4fdfe2f-68e2-4c95-b20a-3e32be8e8c6c.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 0x2ea20b9b06f47c7ef3e266715098718f6e1beb6692748581297a60fcb104bd8d. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/ITQ002401153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ea20b9b06f47c7ef3e266715098718f6e1beb6692748581297a60fcb104bd8d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ITQ002401153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e7d4c071a5e020a1033a49c3e5fd4d1dfa671f530ec96ce4d11d4d0094ac7a0. 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/ITQ002401152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ea20b9b06f47c7ef3e266715098718f6e1beb6692748581297a60fcb104bd8d. 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/ITQ002401153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd912466092c66021ae401f301a3e64809b35948d2f122dd6239e93b0cbc9275f. 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/ITQ002401154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcad37562e7df3e89d9bfe792255f195e9f6327ccac8a6f6fb6275b6d00fce808. 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/ITQ002401155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65b8d99dc5e758ded957a88be40906874944dec6867e9472828242a03cfcc2db. 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/ITQ002401156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d37316e4ae12d94a75948e2d43b0b2196664ffdc5219ebdf60ee990fa443d24. 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/ITQ002401157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2745fd2f84278fd94908146c0fb4baf4b79c0277c8dd1ec2789558c3a27de9f1. 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/ITQ002401158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd0f286e5a47eb3fc1c466f868802d5f47097f6939220cec1ac72dffa7764bb0. 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/ITQ002401159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24d0039a8b18df18b2d93636f15b9bcacf93716df2b91436868183b99a711e58. 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/ITQ002401160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31586da37f08ef518f4c2b60a1c4cab4711bc81fc346494648cfb1ff263878c2. 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/ITQ002401161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafd59e3d8e9fa49021c6df49fb07ec785b434c935f9f6b101b4ddf0f2c20153b. 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/ITQ002401162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb32b574ddfeed0c245cdf39c734c698c62e74e51acfbb33e96ceac53ac5ef69. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ITQ002401163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf87e74e54777b560cdefe0b2b9488d2011d328ecbcf87a85df953af2526e5735. 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/ITQ002401164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc49c3c9e1b64f92adedbf426a034fe0a074e3bcf30fc5536c53949cb0dc8ad49. 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/ITQ002401165.