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 0xe8586c1962819a62734cce017c398415777ea77e05302ef375f67f2cfd886177. 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/aaace46e-e0a5-4d12-aeed-349d656e22a5.json and https://artists.proofprofile.net/proofs/artist/aaace46e-e0a5-4d12-aeed-349d656e22a5.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 0x824b1cc8b44afa4898d09bef7ff932a5f2fc7fc3897adcfaa54f6afd5aaa7a2d. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:06:02Z), 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/PHU012015990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x226c2d1bbde03bbd221da6f597165890d7283c03b3dd9be8cb6e56d3ed61b278. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/PHU012015992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2953ae651214e7fcef8b73063c2210b28c694636035b9a0a84436b2a458568fa. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/PHU012116086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde02fe39fccc535d197cc6ed16abfd53b8d3f7ec181686842ce6c01ae2590b2f. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/PHU012216160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfac951b8305fc2ae15f3af5f40ff881da9612bf66b24ae9531c79a49f5667992. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/PHU012216187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a8fb2e01209471d169348e8a5f86c4d6e14d23fbf35a777d7c78714a74da4e5. 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/USA2P2300375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacb5b4640ead65e31ac35b4a0e3667116e7065ff9dc9a6f2ef07d7c0d81a83df. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/PHS112400479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf95c1b6e059c75542062acbeabb5afb78a2103de6f4ed8b4add14edfec4a4a4. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/PHS112400617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe828c68b6be13dbb452190adea637f2d254dd80190ffe23c2ad40141cea1ab8. Chain 2 (Bitcoin): anchored in block 956425 (2026-07-03T01:28:11Z), 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/PHS112401021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacb5b4640ead65e31ac35b4a0e3667116e7065ff9dc9a6f2ef07d7c0d81a83df. 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/PHS112400479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5184f7c5d12cd7c57f6f3ddd8d6c41708221dc90097ffa23a1e68530dd1b6f2e. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T10:00:50Z), 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/PHS112401022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x105c5ad3b2c1d18c9f983cb8789c01dcae37606aa3ab8f568c8af2202325de60. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/PHS112401024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5ca38edf6fa23fac1aebc090e262409264b03b94ce11c47b2e451d9f85ff5c4. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:44:39Z), 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/PHS112500088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a09304c10ffc55e0541a526ff052887a8036dcd64456f9ee62d9cfd8fd3ce3e. 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/PHS112500127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b99726fd08bf2c3877b4b424a03ef1a061e95c992363ccc105158e5caa9dc4c. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/PHS112401025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x105c5ad3b2c1d18c9f983cb8789c01dcae37606aa3ab8f568c8af2202325de60. Chain 2 (Bitcoin): anchored in block 957779 (2026-07-13T00:19:08Z), 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/PHS112401024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe828c68b6be13dbb452190adea637f2d254dd80190ffe23c2ad40141cea1ab8. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/PHS112401021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacb5b4640ead65e31ac35b4a0e3667116e7065ff9dc9a6f2ef07d7c0d81a83df. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/PHS112400479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x105c5ad3b2c1d18c9f983cb8789c01dcae37606aa3ab8f568c8af2202325de60. 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/PHS112401024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb76bfc6a35817dc429dcf84274b4067db0c62a2288937e07bcb279ce8508e73c. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/PHS112400784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a152bd04e5fc86ef2171d3928e4d3c9766ef13425fac516f1ff9bfa18a12673. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/PHS112401017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf95c1b6e059c75542062acbeabb5afb78a2103de6f4ed8b4add14edfec4a4a4. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/PHS112400617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b99726fd08bf2c3877b4b424a03ef1a061e95c992363ccc105158e5caa9dc4c. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/PHS112401025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5f4a6d42362aaabd35dee9c8b34a510eb4a0213206329fbdddb6648c93ed213. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/PHS112500264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x802501e7c0d081dc0876abf2fea1b726688b34dec3646bab5991f94d8c6852ba. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/PHS112500469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5ca38edf6fa23fac1aebc090e262409264b03b94ce11c47b2e451d9f85ff5c4. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:41:15Z), 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/PHS112500088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a09304c10ffc55e0541a526ff052887a8036dcd64456f9ee62d9cfd8fd3ce3e. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:57:23Z), 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/PHS112500127.