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 0x2666a67c94834809457207518024c191ba5cd818250ccc4a874c21a21c7def7f. 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/01c663fa-a089-4d21-a622-812464b91597.json and https://artists.proofprofile.net/proofs/artist/01c663fa-a089-4d21-a622-812464b91597.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 0xb5a75afa81a9828e3e728049b0c5bb2a3b254702208b8551cec0ce84dafec2d9. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-02T21:02:00Z), 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/GBW7D1100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48defbd5b838066f62bec47859580b4ebe10d866d878e097287ce8c0c769f05e. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-17T02:37:59Z), 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/GBW7D1100003.
Philadelphia (The City Of Brotherly Love)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9b95877c6935b50f1f1bdcbf2cc1c02d91eba65b81e38d374d3f4ac56c99990. 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/GBW7D1100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x291d8de3e533d232c13654bd4a574bd79f0566c2f515b627057bb342884e0c8a. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GBW7D1100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca857bdbb2e43d1605399f52aaa0d281c87f0d4cb3841c9b7b95e94e92245c45. 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/GBW7D1100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5a75afa81a9828e3e728049b0c5bb2a3b254702208b8551cec0ce84dafec2d9. 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/GBW7D1100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48defbd5b838066f62bec47859580b4ebe10d866d878e097287ce8c0c769f05e. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/GBW7D1100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b11c5cab0c6927973a9c8accdcba67f576a7e2222b9f4440944f9df0301ae38. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T16:00:08Z), 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/GBW7D1100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x291d8de3e533d232c13654bd4a574bd79f0566c2f515b627057bb342884e0c8a. 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/GBW7D1100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca857bdbb2e43d1605399f52aaa0d281c87f0d4cb3841c9b7b95e94e92245c45. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GBW7D1100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d806347154b535eb7c047a4a4b35dbd0cee5837750e35a840069e66e7d76167. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:16:51Z), 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/USC5Q1300052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x885c03a7f5eb5d7a6b4b891b709fcccef3173c4a4c199305b1a992b86004c0d1. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/USC5Q1300061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce4f04013ebd8a47801c5be713b171b681f5d51369f69fe8c15ef9abeaefe8a8. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USC5Q1300062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87b7df9ed9e3b08313b12dbc73ff3da1feafd0d66bc00477107154cdf07a791d. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-17T00:19:36Z), 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/USC5Q1300063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x256a4625dcce71d479c8c55d4e28a259a640703d786c86e872eaf1d26c0a46bc. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USC5Q1300064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x964b6c81b2fe02f7ef715d3d60996d2796c12cc304eaac0dd48addb1aff2ab6f. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/GBUM71600756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf83235d4de6a3908d3cd221b01fb42042ed6373e3538d2e58b111760607460cc. 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/GBUM71602040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fc0aa6baef45a1e47b8bbca95997fb232ecb46d5cd2805623147d99be1cae35. 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/GBUM71602042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15cc07a4a4ca28e955aa00c35eaca77ead4d2d30844b4cb3287f01ec7584b124. 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/GBUM71602039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf83235d4de6a3908d3cd221b01fb42042ed6373e3538d2e58b111760607460cc. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/GBUM71602040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fc0aa6baef45a1e47b8bbca95997fb232ecb46d5cd2805623147d99be1cae35. 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/GBUM71602042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb267d5f3bbef7936f0ce8616d2ef2b4e8ab257d00a5a8984b867a2bb503af55e. 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/GBUM71602043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc128a02248b1204941012b45077ee29cb9da5b96994b07a4e11e768769b819e4. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/GBUM71602046.