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 0x908c2910bcf29a9fd7c145af5b3f1283684b540646c8890f185a8c78606198a0. Chain 2 (Bitcoin): anchored in block 954516 (2026-06-20T07:04:44Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a21b4dcc-f0c3-4fe2-a25c-7e29ffbfc9fd.json and https://artists.proofprofile.net/proofs/artist/a21b4dcc-f0c3-4fe2-a25c-7e29ffbfc9fd.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 0x3a11ba32d081496853f898cbfd423edaeaa87e5fefa62a0a7bf55f3532a291ce. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZK6Q2589923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66c99ac00cf323002a65ee7985ff0ec0a1d1453202ab16c93564cf5395bbc69e. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZK6F2566782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b03fdc27f5f34c201db1b1c47e02977663201c8043756d11f0dc999c460a346. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/QZNWT2587567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93c9d7219f20323c6f0b25abcad5ed4382c549245acb843822ba5b86edc9fe11. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:55:21Z), 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/QZNWX2542406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e169a5787e1080d98a85f6b2851d653a5dc08b0067c41ba565d609afbfbeef0. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZMEQ2553288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12c67ad9cb2c83bcbfd6a66d5cf0d1a779ee32f6461638b42df372fcf8861e40. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZDA82514203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f0f6a6892755ca7200457c63a3f3f38709f53c8864f47cf83207986dbffe44a. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/QZHN52582280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2adb9cf125a64bb44770c1563b6810a0e562f77b5ebb406cbcf3376e491ece0. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZZ7N2412127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a3a3db1f764ee12839933feeb51b6e1a230445aea3ec4312795a18333dbea3e. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZZ792512715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65f9dba0aa3f098e75071922425a991f00fb64b9a6a52b6cb0d3c82df1975da2. 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/QZWFJ2516718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd1b16d11bf4cfe98166c83017757d675b8583d91ba1eddc2fd16d99f2ae548a. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZZ7L2515325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd11851ae60be3e9f2d4b33293993c566b0299ab0b9f8d319c1849f2bac59c900. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZZ7L2515328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ce0738864bbd5c97c06ff1926fa4d08be55e614c00b98dfd8287dfd384d9619. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T05:38:29Z), 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/QT6EE2544993.