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 0x1018b232906c6f647ddba274cfee197dd2968bb9c8b2bc4fdc67cfb1af267043. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bf60d86c-b56b-4204-92d4-65595fcefa5f.json and https://artists.proofprofile.net/proofs/artist/bf60d86c-b56b-4204-92d4-65595fcefa5f.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 0x52aefafec38938e46e1216471bb24d32c21f3b1861a87345cb8be2b263f37d77. 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/QZWDE2218029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5195d1249e2eeae23abed60103b5faebfead792a2bca8665af5f57ab3e9804a. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZWDE2249194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2daddc796c181d14299ace2fce9b979a24f84b4f4d4a11ef1b0c61b27bd1f614. 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/QZWDE2249195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b5a6c7410dcb48486f1825971e1ec2d598240952695342bced7e9b7b69246ba. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZWDE2249202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ad99281d939e62055a6daa81fc8c450e11acc4265b74a99560b03d33d78d9ce. 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/CAQ522481006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2931c7e242196c47217bcd86a9b6f6236c46eb9366a40b2c7555f3f14fb15c14. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:36:45Z), 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/CAQ522481001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3da2a7b34b68240139f9cf07b002c943a3ab7227aa6bb9dca4168296441593b. 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/CAQ522481002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f39a612bc9a7f0397abb8f5e4e4654e37658df2663f86fafd78031d5e61841a. 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/CAQ522481003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbd4cc68e5ceca9ecc4d794a6bad9c407bbb363a78fd4cef01fe64b689dcc9ee. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/CAQ522481004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0c51c63dbd22a5ec8ce1059226c18437061fda1299ce7897cc61abd8e1eb92e. 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/CAQ522481005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ad99281d939e62055a6daa81fc8c450e11acc4265b74a99560b03d33d78d9ce. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/CAQ522481006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fc6b45577d7d880ce6e1410b12347b98eee1d697c84a3ab2246de8b6c5b60be. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:43:48Z), 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/CAQ522481008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcba4517da77434987b740dc0ce40dffa1e203d7f5aca94582db921bb538dda45. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/CAQ522481010.