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 0x1a6460ab3623a879f07e059f5a5286acc4c294684aa20375d5942c9e7f6a63ae. 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/48461a10-0bbb-40cf-ac48-24e6528abe25.json and https://artists.proofprofile.net/proofs/artist/48461a10-0bbb-40cf-ac48-24e6528abe25.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Time For...The Pozo-Sego Singers: The Complete 1966 Recordings
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 0xed636104c767ce8c109a5c1858bffeaa1eb95719325813b19be8ac2f4b8eabd5. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USSM19932187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a56d3ad5fde1fa35e310390ecf8aabcf03d85b3ce77b60fddb54d506f117741. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/USSM19932188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x465dbee55070c2098cf208314e5f0643ba9cf79ac660b44b8980605f59b9f6a8. 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/USSM19932190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0b5fa38680696e1f226a765e8ee5bebc1b454acd824c1fe65752e0ea26eef2c. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USSM19932191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e3e56ba2876e07240765a3a0863986d6a88b82f4e1d12684267fb6a5d083359. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:40:01Z), 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/USSM19932195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3152df3812b5eaa5502e5f1bc24e514c57d93a3492ef8cb9b8a612eb68d6f02f. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USSM19932231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8886b9e42f78080d313fb8f6f2b2e4a066a7cd5e6a12b0512e355b71e39afcaf. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USSM19932176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bf0dd4ed3256ef06febf76cc49a54c94b42a303664d6dba1882fc7e2ff7dd5e. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USSM10310244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e96bdbd1fe5838f494422016ed86554d92e1299ac65856c18127c67b698c602. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/USSM10310245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e810fbedf31e1e76793d92cfd93022a4724c2a08c48f653befd73f64dd47b81. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/USSM19932198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80bc4a00a10e337aea6897e08db1c90b2d626f264f8f8fb95179b4f7b841063e. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:26:16Z), 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/USSM19932177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x446f8baf31d4f67b9794e478b1ad9a87c296b91eb55180bb47f65d3db67ba959. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/USSM19932178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2eee32de21893882de1afcb52032b2df4d284d4a3d35a31a8e8ad449cce6771. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/USSM19932180.