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 0x938e04f5f38c0268bc98d691b2176569ba11a523380c434496df7a5f4e1e6771. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/142c6f08-9599-492f-9cb4-1c534e990959.json and https://artists.proofprofile.net/proofs/artist/142c6f08-9599-492f-9cb4-1c534e990959.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 0xe9516b6a090f980d7ddee18e06ed3cd345a63c7c93e6f0b9c567a633030cf74d. 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/QM4TW2493280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x094076640bf28258bd4b9a4fffe0e48d7085e50b2b8d1b11f000214a73d88738. 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/QM4TX2480231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcde2e6f2b845d7102b1deceb8c3b3f2a6b3397e9e38c874b5335137162329598. 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/QM3DF2405674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d39bf4d0a10c3edd7f94c4669688abe52e9b1fab9b65dd4a0ebbeb44cb2054f. 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/QM3DF2405676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc3db7dec6cdb819d51a56b30395a2df4e80f5202c0bf47e62a19923a7c4ea2b. 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/QM3DF2405675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb286958aea9d1795545b97e5774f0fdd72c582ccfa80cb294d6153b7355d634a. 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/QM3DF2405677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20dcfdec97b48b7012bae095c4fbfccaf951b1044fd94ac6dde074c12791ed88. 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/US3DF2505960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3adef87d34f980af4e9b4780a17b13761b507dc6b147f1708e223db424668294. 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/US3DF2505961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3deeb1d09c673ac0289a7722ea67686e3f47b27cc7755bffd95a672614f15990. 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/US3DF2505962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa99b77c0a1f0b8524ab4dd228c0aa2eab3bafc8842125b1f39cfaeefa392bd73. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/US3DF2549674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd65a8d55ca56f51fba77c3084aa6e741c892015a16f22d89f39fd76f92a74594. 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/US3DF2452828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a9b041e4806f0db0c4fc1af5c571645fd8ba00c1f870ee22c6bc3a1d1b5668f. 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/US3DF2480130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x227b0acac4bfea3528444de1eed1143e7738fb2b80d6927cf16622073dcdaa59. 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/US3DF2473607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81bbea1494e5bd11db087fbacc87767200b58dffcdf103e3e8c123668541fafb. 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/US3DF2473606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10b95b4386b7600c6bfa1962d0aa2c76ac1a7f270278d117e461715b620245d9. 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/US3DF2468968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5096f8217af064518548377a452d2e7de7c33a9dcbd3101c406c16259f01b623. 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/QM4TX2457809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8813d2134ac426fd7e47d17fd7f8c4ba6339a9245a0542875dda1bfefa025a4a. 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/GB2LD2510082.