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 0x3ea3aef7cd69a1ea8853f6ead88c362022ea04c40573cf9e73e0f3925558adc6. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c4fc8a37-8517-40e9-aed6-f6260a1c1100.json and https://artists.proofprofile.net/proofs/artist/c4fc8a37-8517-40e9-aed6-f6260a1c1100.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 0x1f2ef4478294f3a75686adfc65b251100379761e43b491b206de0fde79932289. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QM6MZ1591202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2341a74af599db59b1329a803fe0875c74c01022b8fd3d82751c8c619ab10e5b. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QM6MZ1591204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79729dd2cb3e47795dd0a99ddd5015597095836d200ae2793d28cf58c84179e4. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QM6MZ1591205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8858525c70dc22f0438cf269e67cafcaf001f5c5eda5e5e2d1dcef6401d6f7cb. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QM6MZ1591207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda1cae2fef067a9d1d6cc68249a0ec505aa3a15b1b895c906b622b0eb0d91cce. 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/QMFME2061649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2423e542dcd72adf20bbcf0d758059c1657b2e076f866f447ab60c325c25364. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T01:19:42Z), 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/QMFME2061650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb9ff173d3873bca80cd126c30ee55787c431a1679021742e48ecc717697dda9. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:09:56Z), 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/TCAGU2370386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb15fcf20bacab769b216cb34d88a9a57a0044469e2c900998c4df4f9137b7354. Chain 2 (Bitcoin): anchored in block 957705 (2026-07-12T12:50:42Z), 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/TCAGU2370410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ad3b17ac4cb660c671b93eb50c50157d61b89983145fb015db60865e4485544. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/TCAGU2370437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25fe4bb14e9619bd7289817afbd1052a68a0b8ce146848741fe010f3bb7469f9. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:50:16Z), 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/QM7282403797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a92497d69a7841ee253bdae4842898267064c169cc571947aec2da811687734. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/QM7282403798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bee0c9fd7b91ce84226cbf9561dba193e813fc45c2fdda0a31052806f026d2b. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QM7282403799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7647b00931d79dd2824f1d306388d51ecd5abcc836b3a902738a2841bdd86c2. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QM7282403801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98ef8750bfc74df060c9d0a9e8619197e2b64b146a77a8ae1f9c6112d4b2488e. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QM7282403802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65ff446e048505eefde3187eb7959ba19c20add18d2b51b4d32ed5bee19cf7c4. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QM7282403803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf10377a87e42a91a1f628336ddafb96377f24ae24e69281750ce7aa7345fb353. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QM7282403806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53ea8b2fbbfd68fd4e453ee46125791495013c44c5c6c587d07035827b6df5e0. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T03:18:25Z), 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/TCAIZ2440754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe485236bc7ce8e4a4481df989139082669937c69f2de2249108826a330fe2639. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/TCAJB2439084.