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 0x91421401c4b539e40059fb6db6fb92c93dac73de456366bb46ce44e28800b6e2. 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/8d77e1c5-eb3a-4040-a4dc-3fcb0f727671.json and https://artists.proofprofile.net/proofs/artist/8d77e1c5-eb3a-4040-a4dc-3fcb0f727671.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 0x60db2cace509ae931dc1b36643a9e28d25f39d9a5d883744403f9cc4d0b00408. 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/GB2LD1800874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ea4d5e57896b76804c8ee06c8484e3c6c46178b898a6e004d26cbc4883d2704. 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/USDM31918502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a0ea3c1eaa8220ba8ca159f8c71c0c0cd3218c63985f4c0e3ad3219690fa7ff. 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/CA5KR2435414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfef583ca85c8a92f2740393178c5c65a5213c151ddafa1005439b7ff7758ac3d. 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/CA5KR2411299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22ee1960ee48eeee6a1e81b0cb96e4f3b0ac831d5e85b066089771a668525827. 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/CA5KR2400871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dc39e11a4dbc86f2cc25e735618f185e26ef302ebfb9bc5cdf8b4d927ced4ac. 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/GB2LD2210390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74c668e1ed17b5ebc8e88314017492a438bc035a38377b0b7a50dcc7e8e47f8a. 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/GBEWA2201002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2013f62fa16e75912b5f7baef31a40d570e824e3c5d99858068ef591fe5f3a7. 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/GBWUL2190927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d2f4e7eac078bc05c9d6fa07e058f62637daff5b66f7a851e92cda5800426f6. 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/GBWUL2190970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa044b5d4a95b894a611e96221fe0b62f1a463449c932bc63dd4940a03ab95879. 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/CA5KR0006523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e13b93d79cf3a2a76a6124222fe592673811c1546871702424e4d1e97f8355c. 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/NLRD52008144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0c85d5081969c2791345633f3a92202a8dfd7878681edfa184c0f7630acb646. 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/GBSMU7923688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc03921175909440acc02cd129c1100b1ebd92c10b8979eedb0bb23511b6edd1. 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/ATEK01909036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00a9426255d1d6dfc589877918361a60dc12a060d913780d76177e8b40da5cf0. 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/NLRD52008181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1293379d7e86d14044b5bfd61cfa34393f88114a54c1bc5003ca69217aceb06. 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/GB2LD1700093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f009ddd09d7279674dd3047e346f0caaa877e16d6a679750a035f45e12d5c10. 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/GB2LD0902455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaba75f65d0c20f5b458b9c318caeabd16d72bc3fd4f62115a70d167c482cc325. 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/CA5KR2250765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b4fb7d11cb4419ce60db679636c07561dd4f721188a91e0fd7d9971d45985cc. 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/QZES52323076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dba25467bbf32e999b33d10d2eccafad816b7c1833983223185b314849c0b61. 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/USUS12200023.