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 0xadfeddbdae7f151f070aa642ea5e3afc613b98aa1f63761488a6180d83bf088d. Chain 2 (Bitcoin): anchored in block 954631 (2026-06-21T02:46:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cf3e9575-e413-4f52-b947-6de0f41ead5b.json and https://artists.proofprofile.net/proofs/artist/cf3e9575-e413-4f52-b947-6de0f41ead5b.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 0xd4137c0722ea620bae3dc8351b1b7efa55951676c221540851e1e17f32e1f7c9. 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/MXC301600005.
Tanto Llorar (Norteño Afligido de la Tecnología)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b96f9a7677d56967a676dd0cacd731d4172372d9dfb31a8cc5bd98b26002342. 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/QZNJW2040532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe56e6ccc915d7bc9edfb00aba1eaf37f7a337ac3dfd81b57d3e2746e288329da. 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/QM4TX1870992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdf725283626871ac83abde75bcbfb2040404b29507e2eca0a9b7fdda24bee2e. 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/USDY41836556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0ba9ab3ebf234c7c9f7b25fb4d4f18549c320d4485b648f78752ea2ce12422c. 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/MXC301600051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed3e9d191e3da985e560102fe5fec69aa2e3c0bae14e8a45507feb487b9dfd68. 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/USHM91742381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x925d24ab0fbae45307b19dd9c2cebcad6f1e4410c939a8587cc6040962019636. 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/USHM91742382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x755e2fe5a7943a5b7c3e8a9b86859878e90b32145e85f29e61c47aa6133ad7c6. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/USHM91742383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28edcbf6bff91e14381dd914a3ecf2d20254c2a5350d6baf9ce99f3e85d26aac. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/USHM91742384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6899273b18f8b06402cd21c16cd229813a561f25639ac4c263433e40574b0abf. 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/USHM91742385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75e1cb15917a1d09bb9e53f33640de6dde36c3f8fb9ebfa4fa68958b0d7a8ca4. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/USHM91742386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc1de08956d4cba02c74378c17467cbd4946ef725510684dfa1f6c154e43011d. 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/QZHZ31934784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd705b2bbe9e353a8e1cbc013a42f60139666d4b32006237b5021a35635c35dcd. 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/QZHZ31934785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79470cb4114edb0ba3af69eb7853fcef22bf5735b328867a2b59c1cb9aabfbdb. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/QZHZ31934786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97ed4c3b4b8cfcb5c80c94b42177da607084b5bbf732742e603af885ac5bc707. 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/QZHZ31934787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8616dce5e13c1de911ed40972a5bd8d0c00a3e90bb22b0829957b926f844bce1. 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/QZHZ31934788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cf94a3c2373a5f45c0294f7719308d378119dfa36248780e13f67145c511c19. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/QZHZ31934789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b4beae1f6cbe94e5f7d4809da7b9c36ed1bad5ebf6e7962cae01aa54740d755. 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/QZHZ31934790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a25a821157c50944c90bd12233da42ed0a3e88095db9fabf3de8d7f3064392f. 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/QZHZ31934791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c968a1c81938fd7e539faee27d341d00344eaa6c1cd542697d56e0a501376dd. 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/QZHZ31934792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeeeebe462f764d1ea4eaadc8ca9f97eed8633aaafd1e6e1231478d6f52f5df3. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/QZHZ31934793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50bdb018953828b555bc4e84b45599b685d54a56abef0a85a72885cdc67305a0. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/QZHZ31934794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac225ff3bc71ce63e80376db2a7bb79cdf955b869ecc5c3ee176af6181e82a5c. 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/QZHZ31934795.