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 0x9ededaeef4dda67e6985bf9c4cc6876d5f9fb42841629a073ca4ce68307a88c5. 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/db8bdf4a-f101-4333-b574-e3304161ec2a.json and https://artists.proofprofile.net/proofs/artist/db8bdf4a-f101-4333-b574-e3304161ec2a.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 0xbc08949c3a4afba27a919f7fa6f3b99634a442ad7bb727d704a93e5262af5814. 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/GBMA22513321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x586a1c163c3714c073d6c159ea4a5d68621ca2fc94299c556ea845ab83273fef. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/GBMA22513316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb22190cdbae3275eb54e2bfc8d2a8aad8123f3702c73cd1fe23c1b2138de2d70. 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/GBMA22521767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54fb09982991e51d1e0c4d171d3589075acde36b589a9bb5b4a6b22c3c42df6c. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/GBMA22521765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d99321120273abf7728f52d07a32bd2687f07315af3298c2ff3a203cebb6227. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/GBMA22521763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf61b811422374be2f90a0cf630d17a405669712d44693633acd7f147695612f9. 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/GBMA22521728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc14b4993a9817ce77b1418ef9c7d712b8a138ed85d668033319ac4ba59880bd2. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/GBMA22522346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x264111cf3f58b84e514e1e913aa13292eeb8e9bd029266d8c1b733524b39db89. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/GBMA22522163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f026061796e419b5cfaafd8472624c1a5fd56d492fff9e4ffa66e57cc083c69. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/GBMA22522162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd67ded031df7e9e4dbf385f2454f35e8df845f966dac4023f5849308bf58e9a. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/GBMA22526595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10ac7f04930d4713b2106b1661ad2eb873c35cfd96db5a26568b594793f07798. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/GXH2J2520994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc088cb4b6bad62b3323e854e7f67a435914c6978872e321fecb74bc4b000cbd9. 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/GXH2J2535365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbe3c72d5277fb9ee39fa4cc7d09b9306e0735bcb1f111c8b433d8a741205b4f. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/GXH2J2535372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e755fa900464fe10ff749320dc70bfcf38f76f7d92666327ffbd4e81d0d6e24. 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/GXH2J2546693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cc70c2f7d0813dc11e110cc82aac8757c6f2ebb68b364742fe74248bea59a33. 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/GXH2J2558223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71ec6cfb650d6d335a983dc701d7a15cc4b218baf29fcde3a40740ac1c214c43. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/GXH2J2558232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80baf3ae2a8adfec8ab21c3252a97d76e634eb9b0fb6caeb765c83e70a481645. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/GXHAF2513166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e08b65cafbb361db187a601821b721d73d0d41a7e809f8a8eb0a6512165ece9. 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/GXHAF2547280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51d0b281595cdf628edd9a4d34cb55fbf5628f766cd31061d235a4f0beb6c732. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/GXHAF2547282.