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 0xa90f934ec9578cf8a28fe3b1333a95168b8b563d6884e44a7fbf26b330f24f9f. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e4ca73e7-834a-4ab5-822e-a8ea3e3cf7f4.json and https://artists.proofprofile.net/proofs/artist/e4ca73e7-834a-4ab5-822e-a8ea3e3cf7f4.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 0x4b0bd7a5bd22a66e5f63fe2efbe8151ed14cf55d62651feb0f555215847674aa. 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/QZZ7U2595581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc525a466be1e2a6917d88725300072b70cd81d485d7336565b7cae63768d56bf. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T10:41:34Z), 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/QZZ7U2579837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0ede5b49b7c36d2c84e3f5988d92fabb9ed6b20a98f6a711db0b7014d89578b. 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/QZZ7X2526157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9100473bd3f41379dbd50826296ce0231ad9737803223bcfe125cec00804db4a. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZZ7X2526146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c779a8ad087ad97b6316c0afac4231642a50daf424d8e22a10e0d057b0a0e23. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZZ7X2526159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4458121d37a5a53d121b49b14aa67fa640214775da9e2b1221abcf620220705. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZZ7X2566081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25490afac8ad116cdc20a46889c61558c503d94130c9f012460838fb91f9c8c4. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZZ7X2566186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c359e070c9b78e495d6ff6740c115fe008641a6f2b2d6de7006429546e80481. 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/QZZ7X2570080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c9b9d9317e055dbb68e8c52c4716df5dcf82e298026037c75fe025b3c2ea283. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZZ7X2570082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1da30d2db149d57d61602dd858a7b8d7499b4b49272d2aa7411cff549c39287. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T06:53:29Z), 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/QT3EX2522401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3798993084df9140bb175e8ddf811c1fefc5f5bdde3b81c48b4aa06398be5ab1. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-21T17:28:38Z), 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/QT3EX2522128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f04714432de108cb498e339f3d8e7dadf642d1262c421a1b2470c0750dd65b6. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QT3EX2522217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9279537ee583140d9f0e1c0031eb626c963ba4300feb4d7f55ae91dcef3b2e3. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T15:04:37Z), 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/QT3EX2591210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98daa9eb81c995e2bf839165381a5d7a7add0364c4649197379e12c7b996bea6. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QT3EX2591207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f9c9921b5400af9deea3c7fea4375abc8af326feaea55f522c5ca6d22e86953. 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/QT3EX2591205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51bc046b5089e05f47230568d8b551fbe61a7f490c7f1fdc4de1a5c5078e0f68. 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/QT3EZ2530635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5d0714ef915cacbc4868f9e05e110d3a513330aee061116c39461372e790109. Chain 2 (Bitcoin): anchored in block 959109 (2026-07-22T07:21:40Z), 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/QT3EZ2532529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c4a93d8e26cb58554063afa9d7d5a804ee101b6667f2f14efcb8b8e99a9e9fb. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QT3EZ2532532.