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 0x45f567fcd3f80103488ac6fb884f3b1391482f73a98407afd153277757b090ec. 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/c0dff4a5-c31f-410e-8a40-4cc54ee846fd.json and https://artists.proofprofile.net/proofs/artist/c0dff4a5-c31f-410e-8a40-4cc54ee846fd.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 0x0f35a28ed3d44c6df7bf769f081626c742558cca8cd268e54efb5d8283d84c60. Chain 2 (Bitcoin): anchored in block 957564 (2026-07-11T12:19:47Z), 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/CH4102107315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d5bd16cba28eeb9cff70ce73aac7d3edf78fc7c26c50bbf16973b1defee51da. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/CH4102107303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84c8d9ff12a6cd96f33f985635da83a8a0f1d9685a220bb3769811ac5824c19d. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/CH4102107301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ec483b3021bee397985ec6154752617d31fac197fef0068701bf7886875c630. 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/CH4102107302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f78b357f57ee4ed1c6d3bd36936340f5727bd372d880a7691a4a6512e2f874e. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/CH4102107305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fab496d42e33a7c54ed41f24f38f0f604c475ca041411a9209a63c44004296e. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/CH4102107307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5a0e75c7009d71c8fc94c22debe1b7adfa486ae2d9f39706c0172921eafd42d. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/CH4102107308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93ce1a62240a27b9062977ad2e4ee5fe2f98ffc2de4732609ccf7dfd65524054. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T20:44:14Z), 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/CH4102107309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0e7c1010ab1402fe3cf12ff66682759aec312dcdd64c3016e821efecf1f9c33. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/CH4102107310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24659bea348e1d8ac7785f1c8be270aaaee68d341d4f4f2bf60e78ac5e3df068. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T08:32:30Z), 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/CH4102107311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ddd8985ae3137b851acecce85ce5ba02e13a6f250cd04e93022c7474ac1f926. Chain 2 (Bitcoin): anchored in block 959013 (2026-07-21T13:39:11Z), 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/CH4102107312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x937f575eea400b768bbb4fd5e7ee31d66dd6ed2403ab1f6a9fe2e5f65a83c1e3. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/CH4102107313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a8aeccec49e280f9b4556e185f81c480e5d1ab3e7f97b09b4b9924363b091a0. 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/CH4102107317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78425213da59b3ba6b17f01fa71850a5cbcc60f852fc4056855e847f148f45e2. 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/CH7812424688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfcb30eab3d6bb06cf2cd86573778b15ea2c7e374afb26fccc85d09065d92516. 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/CH7812424689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5fe66b976b9682964a3cf7ced89c273f890b859c372c36c13a07d4cd2e6b336. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/CH7812424690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19e13c5eb1934e8e1dcae4b3ad5dd84c791f79639774a1a1a34491fa7f830869. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/CH7812540307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc80d23717518923dfecf974174769540ceb6ef876d9e622a72e81ef112d7a0ab. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/CH7812546580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x284113aa1bbe8367f43139bf739c7b3ad1863a80c03a88234899b2ffce049c1c. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/CH7812546836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70ddc917622532a0bffbecfe0581c658d6e5a4a47a2384e931fb238fe33ff7d9. 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/CH7812552056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40fe5281637f3c45a34bd4103c7a864efaf6935f5fa116d46100a2c3300e3893. 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/CH4061901683.