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 0xc02d913f4ce84ff18a83b2e2fcc020e89b89d5d7cbb2fa50f3cff51de277053d. 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/800a769b-b738-4fd9-b5ec-c959757df4bd.json and https://artists.proofprofile.net/proofs/artist/800a769b-b738-4fd9-b5ec-c959757df4bd.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 0xc5a3943a99ad46ed4e88f1910a39e2fdb30fe92b8a7ede7c0f92d606041b0bad. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/BXIV82086417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadaca284215b7bde90f521a8a35910fe433b32df19339e561088a60d83253f0a. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/BXIV82038626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb57924abbe673568a73607c5b25ae3859e75958a96663e40ca0bf6a1bd6fef46. 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/BXIV82039375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d4d2c0b5be244bcc14e303a6cc40d0c0e924ef5c8b7f1cd273e810f7b03c345. 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/BXIV82079182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1892bfe4c14ee6be749ae36269f413759a56740f28a6fe429d0fd14de868c6d8. 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/BXIV82043594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69e7afd8b58307f7a52365cdcc0c2e21de8b5b75cd16588432576603938b4bde. 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/BXIV82064979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f9725f4e000a77117f22a8803f10840602fb4b8adcd170568d132eca537cf25. 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/BXIV82046488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0518d2a33de2345fcb3740383dc009211222782c0891ee60a5a56b6ea15adc39. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/BXIV82035244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x974a6bdecc16ab19f28ccde60615ba8cb3ddd88686c5c9ae976141f91647d880. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/BXIV82009257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18dd21db74b8af3507221c468815d439cc57f854497f64ee4eb6ca65c37136a7. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BXIV82016846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeddf635123203ca21e3bd9cc7886d9e95ef07a255cde545691e980993349a74. 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/BX8JV2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8954499cb1e41f23b8d3b58bbdaaf594a96f2281202ce4645e25fe8852137b1. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/BC6M22431055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc016f4b334cb7ad87964d547af4699ba5950b1d863f7c28dae0210447d4b1d96. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:09:28Z), 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/BX8JV2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe150af0addd359942a7eb92f93bea2387e055bf10b720032990a49de11a257cf. 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/QZHZ41982087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12bdf6e26818a24019ef27a1e760952e3e93e8ff6e806d2d9540cabc350040cf. 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/BXWMU2000010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12bdf6e26818a24019ef27a1e760952e3e93e8ff6e806d2d9540cabc350040cf. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/BXWMU2000010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x008fcc2c6a245cc0a3f7a3e591aa59c9212e20eff9815aaaa3dc821c4d257365. 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/BXWMU2000026.