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 0xe4b92b6fe7ed028d723c4f01c0bfbec7bdee144beab7236c66cba1b3d1d077ed. 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/fb73c820-a77c-4141-80db-ad7efa69a3d5.json and https://artists.proofprofile.net/proofs/artist/fb73c820-a77c-4141-80db-ad7efa69a3d5.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 0xfca6e1d55ad3881bbab64c2068752b2134a223c61d653473bdd7200d2a611a26. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/USQY51143703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cdc7b234b413eba64ca57e846ddd91924e2787fce656dfefa132c7727ab6187. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/QMNLU1210006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0079a922f9a8388e9827a559b14446eb3243d7c2432b8a471ebd434b79cb2252. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:44:41Z), 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/QM88K1400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6157eb48f7af81e85795f43a6b3a8650df6e2d73f1696ce66e3fd983c98f6850. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QM88K1400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77a8b5543a4d6723a6e3d28e9faf5e4018d3225efc16b566359ee9fb4e15f91b. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QM88K1400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7e16eb50431a8e662f407b907a090941284074cbf49744d7ab8b8a7dc0bae19. 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/QM88K1400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3de61c5b63cdaa45c2c2c040d3aff9fc429e119c7cd85b0a679c206ec8763a82. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QM88K1400011.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5a0950e0d24b62feb0a866352ed0b0bdfe07d7af375178117d55e00e93e620a. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/USCGH1549170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb33a8b0b234e78bb05e3eb48816b9ca1483313fe5ee5726dab395bd7c035b3b8. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:14:54Z), 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/QM88K1700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93e1229b86f9a6d3fcbca145b7108432f2ca4d8501212d0dfeeff84ca33a9311. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QM88K1700004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1ab1ba11cb58f10e1a601cb602a25f344a8d2cd6de7b02d275903ad5fe7ff91. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-16T00:06:01Z), 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/QM88K1700008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x850508e55458d1e05db99174256e4093ff818c2fbd866fcd9976b25374ec3678. 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/QM88K1700009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x132a981630f474391caff4e6006332967fcd5491c1b397faaf86d69866edf04a. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:40:02Z), 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/QM88K1700011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28aa7f1f4ad12e79cb00d9c7484abb78e7ab8d98d2f3c00af4c5ef03d020bb98. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:42:55Z), 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/QM88K1900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf84a400eefd05eaaac997575b04510f41ac1f1b2b8ba227eedfc2aae1f6d80ae. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:02:57Z), 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/QM88K1900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c619fdb1fa978c107c90c20fec13f4c286666ff719359fbd169ce990f24e124. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QM88K1900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21482e777c7a053fa6dc2a85eae5e873e040254fdca34ae275c4bf77b04ab63c. 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/QM88K1900006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4256ffe721ce8d20656e91fe3b1c917e81a0fa16ff8caf62ae28f325bb1125a6. 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/QM88K1900008.