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 0x9cb44ca15845da5d26aa8e4551f719116ed134b2ddc9790f9158bbbedad56553. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b58b7c98-d9cf-4bd7-887f-da0d80b62fb4.json and https://artists.proofprofile.net/proofs/artist/b58b7c98-d9cf-4bd7-887f-da0d80b62fb4.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 0x7a2fec4976aa2d135cbd5c790a3f7455c123eeafc5406271e3efed90d7be66a6. 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/CA5KR2414589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94bb7132a2dc0a57df85ca140d9637df7dc04ef3052c953fb7ad33d02aee654a. 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/CA5KR2412442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4e567d8f24c565c635fe1db906d20bf46380ed2557b002653796e62c731c95b. 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/CA5KR2412444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ecc53e410f60809f0330e092a4f12310f884dc9fb4500709a30d1be02c4a59a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CA5KR2407870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a875645577a3e014a430267198141cf13918f561467cb5835d6dfcd54000e88. 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/CA5KR2412447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcd501ceddeffcd10d590fe7c82b9a08b923685713f3e950faf11beab246abbe. 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/USDA12318707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87e0bf6577dcad2664642d292bb84f9df95b41f5dac66e10f5dcddeb8b97e677. 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/CA5KR2408567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69c08e3b9a0be369ef9d3cdeb14df0a0c6ae83c25d61733250d1b995e9195efd. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/CA5KR2412448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d752e4797f8e490bc2799a61e08d62aba57959d2a66eee3c2e67bc492fe4964. 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/CA5KR2412449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7b20c9f40f2e2b3b7632007597e81825395d49aea13161ce22155b4f00e0578. 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/CA5KR2410738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x215c4613961049ad4e93757c44c94798040c5f338327312ef12596cb37a37f46. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CA5KR2412451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c8bc3822baf8be95d81eebd70547bcaf1567f661fb10943e0244d34cf365e90. 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/CA5KR2412453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74a1f45b281b420119cad637dbc9e5efc77c7db01be7c6bcd5d4494f7fe3cf3a. 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/CA5KR2424290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d451a935221ba095a0fca8c625c7824163e6d731364c7513a1aecee5b53c57b. 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/CA5KR2422748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7ecc7c7b217a6f597ea345385259d42e936db106a6339c78657fb0d662a6e86. 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/CA5KR2422749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x945dabc216e90e882030347fdd0a654ca6264b8a0f1e155d0b50ae8d92ae43f2. 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/CA5KR2418695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aeff5b1aa155057e4e322f702a670020430fd53d11b190ccd0ed96e4c604a75. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CA5KR2415282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7b20c9f40f2e2b3b7632007597e81825395d49aea13161ce22155b4f00e0578. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CA5KR2410738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0794b9047a4d015d0f4f37d20a8da88ed7c69318fa61c5f023053e06a0208a9. 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/CA5KR2410739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87e0bf6577dcad2664642d292bb84f9df95b41f5dac66e10f5dcddeb8b97e677. 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/CA5KR2408567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ecc53e410f60809f0330e092a4f12310f884dc9fb4500709a30d1be02c4a59a. Chain 2 (Bitcoin): anchored in block 957039 (2026-07-21T18:59:21Z), 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/CA5KR2407870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97b235972218fe0fb2da6cb15247a97e1bc7f2954bff7b65fd810e73d0620520. 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/CA5KR2404735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcd501ceddeffcd10d590fe7c82b9a08b923685713f3e950faf11beab246abbe. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USDA12318707.