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 0xc16a8a2eab117bb4b0bc879a31d25d2f7b1f58e8c5aaf7b35850b818bd58cc8c. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a7c8f1f2-a474-4108-80ae-a7ccb0f65125.json and https://artists.proofprofile.net/proofs/artist/a7c8f1f2-a474-4108-80ae-a7ccb0f65125.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 0xd3d7b337db94f6a912c939b87fbc3c5433b4c1fe827bac1ef827fa6338825fdc. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZNWT2330093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa85a18b7734209e85b44a2f56697b2532681bc09519c77c79250317304dabc71. 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/QZNWW2406705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x849c7988153005cb51cae8694c71806b13479472ee737b18ad2c01763bf56c49. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-22T00:39:47Z), 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/QZNWW2406706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dda091f1a8949c104d37d7c17e62286c296c7eddf3bfe20ae0146e09e541906. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZTAY2431795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80381dbe51f6ccd2226434c7b7107ede25f9161023996fc550d1c7192762d075. 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/QZTAY2431796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3a7eae99a8d4d3a096e5e445ca76b8ea9a0a74e1efabced5009e463d2a39651. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZTAY2431798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x825d324bd0f95854e3e338afad72541e010eab70ea6b25e1af9648eb51fccdcb. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/QZTAY2431797.
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 0x37bef41affb9907ceab9b4365c283dcd27b7e35bffef70aa88f48073ac5ede2f. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/QZTAY2471298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad5e5a4bda6d86f9bb9811c4d4c746d7467c753fd199ea3643597c7192604927. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZWFQ2463096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ec9bc4686d1a8289182f9b0a34376933a66f1f3efd574bc7843aa0e14403515. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:28:46Z), 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/QZWFQ2463097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74a39c221d6692faad75d88f251f0467e158a158f94a4c66fa6777b3743837a8. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QZWFQ2463098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c75b07a01d330824762b267a82dfb4224cb9913038487a547d98ace73420151. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QZWFQ2463100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbacc3ba449e38cc5d66e426bb333037c955c97b13b60dce05ea8b98fa39743a0. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZZ7Q2491381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x132199b07b20b74762e86c838dcd9caa2b0509c7c1acf44e9a419b0525c7a229. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/QZK6L2522196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbc4aa3453da901222b367b90bd3691c8ddfc2edcc76e9df38f2af6eadd59cd6. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZK6L2522198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x353ad1f3de45581a832881184d7f594a89b20fc1cbcad14b09e073b9b0a03c1c. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZHN42341479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb424e30933b85878a18b2508d49af5379c323caebf2c3a78b0712ba7e2a7fd4. 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/FR10S2419065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb424e30933b85878a18b2508d49af5379c323caebf2c3a78b0712ba7e2a7fd4. 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/FR10S2419065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04550c11085e332afc7228587493355218b86845209838a8e22cb9ad1de22105. 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/FR59R2481071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20d2e1250d360262ceafdca20b1cac853cea3015534341879edac5759bb50489. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/FR59R2481073.