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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x097cf49292f1a7f049b12734c2a43a27052591382a7ad02d536895cfd5100008. 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/4e08611f-cfb1-4341-8ec1-95161865c76a.json and https://artists.proofprofile.net/proofs/artist/4e08611f-cfb1-4341-8ec1-95161865c76a.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x686b03b0eb3adf2d6c02fc5a9d6c885eee945951a3a52892cd272091a2e4c8ff. Chain 2 (Bitcoin): anchored in block 958706 (2026-07-19T08:50:34Z), 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/QZMEN2148042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31d0cce51a4c896fa4fe375a96b58b1ce22516527e1bebecf4559e2f5b737e20. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/QZMEN2148044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95ff939655b6bd9dd4c5d4f3080af48853753e8c60ca9c87157fc305d2f464e0. 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/QZRP42174191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86cc65bf8f0974328202773988227421e841307c8cd09e803eadd50367ef5de0. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZFYY2281254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd616a7c76885ec9f13089a306e63d3d7054fda3d785672b2ba0d641c386d005c. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/QZES82221942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa70a78d2a9a49939e3203a5d07ba82cf2b64d6a16cf6307f82b23f2c4aa1eadc. 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/QZK6Q2284222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf28010aa460e1c508fd636e40a2d08ea28502d8ec500dd6587c42173d2a75ba6. 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/QZK6Q2298630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04478cec77ce0a951f4ebf76a483a66843e58903aac710c0d1f567cdeed5bf2c. 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/QZK6Q2298634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28046b4b5fbec7219caf127f8fa102126b481d3e0f2d0c2cbdf6340c76e28989. 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/QZK6Q2298635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa70a78d2a9a49939e3203a5d07ba82cf2b64d6a16cf6307f82b23f2c4aa1eadc. 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/QZK6Q2284222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d99e1b75c0ecf3388a7bfa695da658d314c92d6c062060e9533569dad1271a1. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZK6Q2298636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe455fdd2ba87311da0d87b4a7e669b31ffefe9d290fea540fc69a679580a125a. 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/QZK6Q2298637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1640af117fb4b0279fc237ab49ce45eb6f87016716f5417bbff3b3bae6699056. Chain 2 (Bitcoin): anchored in block 959054 (2026-07-21T20:19:31Z), 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/QZK6Q2298638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bc1c81dc48e2cea7124a5edd042bc6a7b399756f7541bab36d32287205b2cc7. 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/QZMEP2257383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e438c26aabdd3273a892998340c934f6bcbc61ab3b182375146404e92b227c6. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/DKAZA2300222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d95c011a60358e5a3a9534425eee19513815427fce59bf12078b0d39dd8adf6. 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/DKAZA2300152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x364f6800ce404d3b14d532ba42c19ddc0ec174903d737642442e682a01198bb6. 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/DKAZA2500167.