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 0xab3890b422329c4e0c7822484f98005a53e88cdac0211994a43df4d86565c21c. 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/83430d81-ecda-4801-8748-2c7c61426ff8.json and https://artists.proofprofile.net/proofs/artist/83430d81-ecda-4801-8748-2c7c61426ff8.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 0xff7975ede75d77b3bcbdf83a65e4291edb78233da11f52ee0385fbe9ba33a3da. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/QZNWZ2163378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47410ce366fbb4c0556cf33d9554e24c8f7f38fa5c980a2613ba6270aa8b0b08. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZNWZ2163380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bc048d82c78c488f8819511b7736c0e71f66fd8487fb3716068102a5ff5c34b. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/QZNWZ2163382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x484cdab3c2da0d8b36d09b62a57b4c280f805006b74566c3de131cc4b745e338. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZNWZ2163383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9776ab7c0fdc3116de89fe4f4d5e156e0f00f1a052f7e934fddda0e0d99804a0. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/QZNWZ2163384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7e27e6cef50c58cba915ffff4cf68744f71e8c382c7fd7b3ae7bcc5c22c259b. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T13:56:40Z), 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/QZNWZ2163386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d4d5fd8986574d2c55f7f306229f9bdf2967e3a53c78bc853e29d73d81b4208. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/QZWFL2379679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x698e7167f4b43a477290edbf868545645862dfdb042b4560b12cd8f5f4972156. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/QZWFL2379680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c0d945b742e7f8daf6257d0ebf17ff709a5f3da54c031e2f3f37dbe3f1588f6. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QZWFL2379681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfa748a1dfe5b99e00b16367f43af9a6e96adead78d968b01a3e8045134ed32c. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZWFL2379682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38ae4c7517eb23ce60104d493c21839d4b1280527ce76b9bcaeede056618381a. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:56:01Z), 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/QZWFL2379683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf050efda467f1d642031ca9e20bc1b2033774514ef77c0ff5fcd331eb52f5c1e. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QZWFL2379685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed83fcdf4520da900524cae1f3d7a009cbe54764f6d3fff5edf5ca5f1c33569e. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-17T03:31:02Z), 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/QZTB92405773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeb2d77e864bfb02be1280e9fd5062a94e68e5b849d377f02974f5287e03acc3. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/QZTB92405774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e08c7c02b9551c427f2642d63e414a11ce38acaf45a6c53f5ca22a6a92f4112. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZTB92405775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5b23e3bc359021a668f684220e00a3300de173e89a019affab624e32a1f9f25. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:19:50Z), 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/QZTB92405776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1005a55a53d0f52418b7e35936f75b15c6a916780b87bdaaf7480d6b000ae1d. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/QZTB92405777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca2b49d021d207c5764b210d1129a6f0d025c48a629cc387dae31cc2a7020c9b. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZTB92405778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4faab8024eb4cfd29b8e92dfb1881fbebf9cdefacb321f74c212b0a5f6542ea6. 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/QZFYY2555581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b775d4c929e2ce79bb13a00274fa68e013b88ad7e84aaffe8d5faeb49e2fef4. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZFYY2555587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x964f98317088038f6e83f39621da4d818acf183667b3bf1c5b7ec11f3112e2ad. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/QZFYY2555588.