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 0x31efff9bc7303af99f746e98433dd073f956324cb57e545efc369681419af277. 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/9594525a-5b13-4e8d-aa46-63991044aa4e.json and https://artists.proofprofile.net/proofs/artist/9594525a-5b13-4e8d-aa46-63991044aa4e.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 0xa51de16f646d3fd911772ca266a58a932b7bfacc47d3a2b5ed8574d85c39a7e2. 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/TWIB32100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c6bf199cbed12f625c7fcc7054ab1afd5d888684690d00c7189e79ce2ff90d2. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/TWM252401001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ce6d74a2f740018b1439fcef2c2b50f1c2def263e379a866a70fee29372c3e5. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:23:34Z), 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/TWM252401003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58747e60fda5c1dd910d2f36b75f09c97e0a6d3f283dc21806144f254409bd36. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:23:11Z), 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/TWM252401004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcce7f49fec4b267bc4737af66bf9b46dfa0713c98b67c13c722502f0b92f57c. Chain 2 (Bitcoin): anchored in block 958042 (2026-07-14T18:24:07Z), 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/TWM252401006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8cdb4c27ebeb159c1d166f295693ca01894df75b2d697a12a9109ef37530bfa. 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/TWM252401007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa41ec00fb0d608eaa3c22ef8c2538b0895b6eac8dcfc0175a2c0d2c5acc5fa07. 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/TWM252401009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x194450ee510a25b812dfa653cd358021d363e507105da25c96fa383096046821. 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/TWM252401010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8b7219e3387906c40bea113e039f17d04777fc6160f13bb51963bf3f7039e21. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/TWCX11800201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e82ff43b47efd6942ab2772d2066c7791051c7a9eaa254277bd1fd39b575735. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TWCX11800208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1bc94edfccb0f667d536af8502c51169e84e0d95a71616244a8e0e11543a1f1. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TWM251500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d651b916b09806e96c6494673700a7ffbf12dbc825659f28e790ec4a75d436e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TWM251500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedc6cec54f677dcc184d985bad8dd62ad1b418ef50d5a0f2f6470181e01ee60b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TWCX12001004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc7cfc5775f51592fa3c250f119f2258a63c20ac6629ac856f99fbd7484d55c7. 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/TWCX12001001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5188b38fd8c375358c37ea0c6fbc3741a62d65f93536ae2cbb2b32d8713cbdf8. 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/TWCX12001002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedc6cec54f677dcc184d985bad8dd62ad1b418ef50d5a0f2f6470181e01ee60b. 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/TWCX12001004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0fe4b75dbd0114c0e5e986f7a45a960b207f5a889770fa0ba6715acffb58228. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/TWI972276806.