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 0xf4359ab104f77ab924bc86c7bc3b05b0e3d06decf921fb8bed4d54584a9af21d. 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/77518734-19d5-4d96-805c-e846a513c867.json and https://artists.proofprofile.net/proofs/artist/77518734-19d5-4d96-805c-e846a513c867.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 0x074c4dfac939aaacca65b0ccae3f81e216dbbf2dc32b2e89ed42e9bd1e2c4561. 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/RUB422000386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dd2a2ae3a20986b6e211f12a3ada9c30708112c30c2ef6d6abd36b3855c28f1. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/TCAFB2080348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc91cdc67cd902a1c73b2a4e6bb23d53cb203b6e9af20b696bf6281b03aad0acb. Chain 2 (Bitcoin): anchored in block 958613 (2026-07-18T21:35:09Z), 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/DGA082349730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebd7878f9aef8af9c88ad70db1dadcb7813b3b4ee99ec0607adc0dcfd8de3015. 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/RUB422101342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73d44b42a6d242afbb3a28b7e954d84d2171d7298c4abf742f36eea4bacb72a4. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/DGA072249875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73d44b42a6d242afbb3a28b7e954d84d2171d7298c4abf742f36eea4bacb72a4. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T14:07:58Z), 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/DGA072249875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2dfed79538003ceffb1cba188103952eed95d36f9c1d1f482468e2ca2837343. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/GX8MV2200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ef9dc91d9e36e5fe6886e376becc35d364d8dadcdc4cffea9c058c5ab5b28ab. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/DGA072306812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dac2ca8e0c036bd95c46cb588211bacf44ba991a6b259c2cc293367d0c48160. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:30:20Z), 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/QZPLR2032950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x770ab94c8a008c50cc08c68302411ddf1997e1ef50eee0d3288886edf51f63cd. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZNWS2036259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefedaa603984fadfb69844fec324422ece105732127a7beb4bd053fe59eaf783. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/GX5MY2486150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x084a41c33b8c3b1d75ac4fe49b6853080f99bd89e28e438c3b13d635ee2b9a1c. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T03:59:40Z), 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/RUAGT2480631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x770ab94c8a008c50cc08c68302411ddf1997e1ef50eee0d3288886edf51f63cd. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZNWS2036259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd86681e79a8a1c1852c2bf9a5075b0f3d6bf81165b9765beec59819eacb3efe2. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FRX202526928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07aa54704e9ab9140459daae3d68b4a11f24e6376ec23a5549e63b7b5dcc114f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GXF972495244.