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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 0xcbd54bdfc716377317f5a603fb7cc3cd013359cbbbe903a468cf1a6a7097a957. 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/816513b5-96bb-4649-8a12-eb3a07a079c8.json and https://artists.proofprofile.net/proofs/artist/816513b5-96bb-4649-8a12-eb3a07a079c8.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 0x59da89c61f706ceed3811623d20ff77a98a1d0f91309624f57411eee0c7af537. 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/TCADR1874851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x826845f5fbe953bec13d39d858c19768078ea30947b992184a01873caba6841b. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:54:10Z), 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/TCADR1874852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cf786587ce3fdc240918391b67ec47be694a2f89f2be3d60fb5aa251732a710. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/TCADR1874855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d0f95ec300f56f2c1886598c352aee7067514c91fa3b63f44a4115c507627fd. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCADW1858675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ffaa7a3c9fda75cbc850dc8bcf5bfe79b0f7776d19d8246adb3d460bec570e8. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/TCAEC1917992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab96625370a25750b07e50875c009ec34890d5f436f9456b8a9d14e58274b1da. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/TCAEF1936061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa789f149bfb76119b7ae586c1bd5480d1f8e5b5520d2da5ea6e6ca832235bfac. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZHN61983805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fb0264e1ba9c64665b03aba1b854ce225adf651e61765425adcdd61f5c330ac. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZHN61983806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x408e28813ab146853d35fa37bf2ad2f9237024864e8a3db89ebd1334dbfd3003. 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/QZHN61983807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd76ae2a4c4e0c4e4a3b65da0e54dbf5765efdd7b8f416e68f80739176506591c. 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/QZHN61983808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80fd1ea9f75aa334bb614da8033aa21a8a891e5e789731a9607f3231d9155a14. 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/QZHN61983809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d0f95ec300f56f2c1886598c352aee7067514c91fa3b63f44a4115c507627fd. 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/TCADW1858675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ffaa7a3c9fda75cbc850dc8bcf5bfe79b0f7776d19d8246adb3d460bec570e8. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/TCAEC1917992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7270f36d49b6e6e5a27711739d8a37aa42a2e5f3266a8c23d908cfb4bfbaef45. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/QM6P42141744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5df1d06519489c2131735077cf6e53ebd3585a8d4342500e309250122504b68. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/QZAKB2163950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe746ef6a6d79bde0bd956593d27b4e30faee73a35974163106e173b1c69bbe97. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZSYP2453098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b22adccc084399c9e6bfc0e20d7a43b68f3fd9702251feac97e6026b8582259. 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/QZFYX2097403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x212e9065f17959864210b21de4d7c7e731536f1ee80e7ecc6b38fa7a3543b427. 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/QMDA62104780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee597d4b6298d7903aafde3150a58d5441330b797c4800da323cf10baf685aa0. 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/QM4TW2108482.