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 0x28a445e9c259909486edacf614b9b96614e32d7366727bd23bab0c9e8ec13b11. 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/426e4cb0-ce25-4e6c-90ec-a9f0507fe548.json and https://artists.proofprofile.net/proofs/artist/426e4cb0-ce25-4e6c-90ec-a9f0507fe548.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 0x69a87b3b2996d3bdd1ea026c72e0bb8f3da75783669e008a047fe76ac3076728. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZDQH2417229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8abe7e8ed7ee4c89a60bf5a6f7cd1c5439bd6a94a9cc0c34e6eb95b5eccf294. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZDQH2417233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e269aee738117f16066da3346ac31ecfcdb6e67fcb4f98eac65beb2b175a1be. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZDQH2417239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4049ac50b1c23d94011969b72f50d78802c5f0bc31d05c42d1bc8cd8a7614b5f. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/QZDQH2417227.
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 0xd52fa79e182f13ee95bcf4b6e0dd7270a22020c98b4ed96cf5c873ca359aabd0. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/QZDQH2417232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaad7176472df96f382a1ca45fcc357b37cb2fd2cb838c217c11be9a57703099c. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/QZDQH2417235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b794e8fe60f992af0f688518668ca2c0153a619e2befa2a0ab67dc9677eff72. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZDQH2391841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82a07c14e544cdff16519fb07a94813b7218e4c2ad1b56507b72d096fa45897c. 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/QZDQH2391766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50611d6cb4cff423054380eebefbfb316bd31023b6f41db8bd0c02372184c065. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZDQH2389084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bbbf659cc2ce75f712baf04c13983e4f854d5c6187e7944f4c09c03dd1a1341. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZDQH2373667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5be8620a2d222d72402289485a17f4901953a7305f51ee2f429785cf01223ba4. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZDQH2371293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe29e737e8fea993a7bad770239447336f3b126f3a2ecac921a91ead0e1367cc8. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZDQH2371294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05fbec8de1bc7af22afc4b193b094126b98b47075b3bd48e6b3ad4f3a3b937cb. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZDQH2371295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x001d1618c760d1e32b2d7c7b9a1d45dbf45c563c7d9ed54605e2c3eb125c4254. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZDQH2371296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e9d40fd95affe04df3dd1a342636c6b1304ac66f4678dfd3c775c4311d1133d. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/QZDQH2371297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fcf785bb2a07d76cedaec5e1f2b71b3933396814acce161b8b0da10fdd8df87. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZDQH2369162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f044940d80d3706f1ab03caed8301649b0805f0a53e147ece91c00fe984ba54. 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/QZDQH2362827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x722b21a54fbcc2f94047b32f6b36457532c24a57708f8e36c7f4c3ad418d67dc. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZDQH2361673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9edb854e79b51c45e576b81af45a133817c4fa9244f24b47f2cd1e7a730745ac. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZDQH2360061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cb24a742a108f12b7c1d273bfefc2a625559a391b84b1ac6785edab3e1c8da6. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZTB62256240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98af0f6d808885b0df94b58363533f146a8c293f8daeade03cc94ec1b6e87195. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZTB62230368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80cfdf1e14f67a7dca829073cb8ff9d7910eb6485ae03a66c2fb75152204a6b9. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZTAZ2250566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e502de9bd807ad1d555319c2bb5945ec8c4e46c9ba54a3911095446bc5d16ef. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/QZTAS2288374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebcb2fdc3079c2303a114cdbc42408afced7e51dbd408308a4412f9679353490. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZDQH2262348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb83a31c663ce51f23a302790a8f4f26a0e22b69b62bf043f6a23c419f2b55190. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZDQH2260202.