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 0x3d9184eac6aa09a7448d5e0e68cd2204ccea888aad9aef0dc8d3f7e98a241ee7. 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/0b3bc7f9-708c-4fb2-b605-97f4250c18fa.json and https://artists.proofprofile.net/proofs/artist/0b3bc7f9-708c-4fb2-b605-97f4250c18fa.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 0xabe9040b44efa8230051de07e5820e0f64a8eaf41b4173f2f5b2f64606aca854. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:00:29Z), 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/ARFQW1700463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa270d0a553ee1e21d9571031ca837af37079a91d9bada3b6b1e9b240d467a801. 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/ARFQW1700464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb31021da7f1c5f5881307f4a82a9248bdded8b9a00448e7d0dea6d5445fb2c66. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:06:54Z), 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/ARFQW1700468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ebfa6a882412d66d3ea718d131b882175acdc45988f5b48ba525e646e29e86a. Chain 2 (Bitcoin): anchored in block 958691 (2026-07-19T07:19:31Z), 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/ARFQW1700469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x909861c6affe45e17be8260c488693cd37cc9e6ea0d28f06897f7af5ba51ddd5. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/ARFQW1700471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe36a6fd3074430705d91c3e6951fded268cb883288c863cb85a41cd594b415bf. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/ARFQW1700472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaa9d238252ca1fa3e5a1bf87af5fcd6d102419a8150b654a6b7e904a9bb9f96. 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/ARFQW1700474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf48424e689094d90c4f4a52ef872bdc5de029289c47b9cf8a2ce6364f11c9d0b. 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/ARFQW1700475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96aabecf07ccc41f68fd4e237e079ba36e1738df15eeb93b23be91c99c580358. 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/ARFQW1700476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94ed6a7d4ea934991916df0fb951bc5b14586c37e498139e63eef18c7e6ba01d. 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/ARFQW1700477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x245d33b69db3a46cff27189085d4636dce9008f70377edf0bbd4d4ae3883089b. 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/US3DF1984791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc14a74426da4ca6a3ee42535195c0359f0d21bb92e26af1b64b89169e88a4e6d. 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/US3DF1984792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf21be466cdcdc23baaadd21348e3541415bc3b7e82eb0bfe8a64b3c09d791a5e. 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/US3DF1984797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5380b5b26486bf7eb30d804ba9a9841d9261ae2c80376889f70b9c28ef7dc54c. 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/US3DF1984798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf998981506733e577bc49f456494faf2a678d2fbb6e595e9a029d7a35de1eed. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T08:06:23Z), 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/US3DF1984796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5380b5b26486bf7eb30d804ba9a9841d9261ae2c80376889f70b9c28ef7dc54c. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:33:40Z), 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/US3DF1984798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad62dd8950faf055a8366ec5e45ba42d7d3682b9b1847f6f026a4319609be966. Chain 2 (Bitcoin): anchored in block 956748 (2026-07-05T05:55:59Z), 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/USANG2130776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x345a800f0294704e704d5983e4613eaefd5d5c32fa000f117a0e0d461d7b4ccd. 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/AR5UH2302344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1d08cc4c2fbc67f7c7d4c1b900a5887b140f10937cc0bbe0fc6b81129f43343. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/AR5UH2400441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaac93637c2d1e0104efb0c19ba9e225f52d8f76df0c0d0b9340a930291c2cb02. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/AR5UH2401102.