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 0xd3fef3cdcbfaf3fbf88e18507c26d0fa09339afd6741c8a1153e3f9ab1cff310. 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/ad09ac55-d4e6-4ab2-bb06-458624519d19.json and https://artists.proofprofile.net/proofs/artist/ad09ac55-d4e6-4ab2-bb06-458624519d19.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 0x6791ba64c3ab8b194825791cc06837740e5fdf3012d82a9dc430aa7e677e1a31. 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/US3H40403102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bf24cc8fbbfbaae67c9351f33d861fd8a24740c477ed5614b510bce4250ab7a. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/US3H40403103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe47958a8fb25cbf034a1ff363072292db9c393b90fd440b45f26ba1d6d5407c8. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:33:03Z), 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/US3H40403104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65a345df8585aed1331b96ebe943d64c18a86ef30cc5b30f983c257790e6c8fc. 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/US3H40404203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaea2fd7449b2293fd3115d172cc505fba6ea605f5af1b65d165492d3395157db. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/US3H40404204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x432297a0d204ba5e080754d756bb3a42fdd06f22415912fa11b39e3874e2a874. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/US3H40404205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf54d483fb029425ac68c3f72d8c9bda832c5ca4981c6a0d790daca10aa3707b. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/US3H40404206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba70152d5ed846966018dca45db8fe79b1bb9ca59aee39ac341af23ea05ad6fb. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/US3H40404207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d5bc9d5de518d13f25b5a6a3715973c7472264e5aef6859156bcef64eeb0609. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/US3H40404208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x259321ababcfe5dce46587433eef3156fee519e1ea0f5a78aa8ea7a567b84ec5. 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/US3H40404209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17fcf8a00b60e204ff1af4da5b5a04d01d9106fe2230e3e70b38a4b70c56217c. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/US3H40404210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea225b6f9435bcc503c2be74899e9fef9a53f71011f43bddd9f330f66ae1f7dc. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/US3H40606301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12071fc94a0ae384420da78538aa68b41c2e738ee9a87443bbbc32a795fd687d. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/US3H40606302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90ca5d436934584b878e22957fa4ae5c3c146988ea972839f71d853a2ccef81f. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/US3H40606303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8207968318219f1ae1db3b9586cb4f977804b4bb7b79376dac03d7d5497f718e. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/US3H40606304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2c7496517e3e8753f49910c4886b1bc8cec6eb1cf5bd429e0dd273669943fb1. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/US3H40606306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8df4cdc2ac0bb0592dd7239b0d0475b2e64d335c83a93f498833a89169165672. 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/US3H40606307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21d150b69fa1150c67f23ccd34bbf0cc4e881c21b4d53582c1b3b2cd51d35fe8. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/US28V0610010.