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 0xea4b69505989708bacbbc8e766f9670895d4766cb8f56c1022cb1a83879d7e1d. 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/dbc694d6-622b-4c3d-be45-c8aa131c1175.json and https://artists.proofprofile.net/proofs/artist/dbc694d6-622b-4c3d-be45-c8aa131c1175.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 0x7d9b3b31ea627473e0e8e5ebbfa624b5c0490b5c81b2a9f3bbe9daee4fbbea0d. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:42:31Z), 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/QM42K2086018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa81727bea0d156cf418eaa53dbbde8569143bdf5e6146948685573536fce7450. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T12:42:57Z), 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/QZH5E2075460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7dde2692f5d5f09308e4b2751a30407d180be0f43583c30090d77a9b5d084f6. 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/QZHPJ2096324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bf62da24150dd9b6e32bf3ee3a39db116dd2c2b79d47e399b8bed01606e300b. 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/QZF8N2185395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x970d69e6261caacce256d0e576061120f76da3b8867b5ae6b06e2f90ebccff6c. 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/QZFP52198290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5f4918bcf0484fc72acbea7703d09125da8e51b0115832567a0c2e8b3436204. Chain 2 (Bitcoin): anchored in block 958529 (2026-07-18T09:21:41Z), 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/QZTH82107440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73d0267cfc606e08b9dbb776d1e6c5b541e9002eddc56f809c916a12ea0197e4. 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/QZTH82102830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c9c77eea9369ae29f138f0742bce09d4929c88f2cce61f9378317b9a58f81df. 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/QZTH82121097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5812d4fa4785f3f47b5d4c1170103c71a19b66ce54aaa41af5077ff54bbcead2. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZH5E2210643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe736553f02691f1f784832b8ef581f706188d7af45c4aeecf7ef3148216363c7. 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/QZH5E2287268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a30dae150f5751c46ec5e0f2591a6de94bb2a2eaf10db60426cae1db901269f. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/QZH5E2287281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeac2fdf227dc570f3fc97593db831687438189c5eb1265e443bb31ddf4a2b63. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T12:53:25Z), 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/QZJRB2280957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19b90881504b40e3e09738896d1e4e7bde166768865d7a19f9722414defbda18. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:33:14Z), 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/QZKDK2334596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63ba3194f7b6e8dd45bd7913e1a778cf7c4477f23af2f6547ff2a82bc58da5ed. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZKDK2334606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89c1bdec503b6b91d12360238230d0ab9a2d0717cf76be19c9f577cff49828c4. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QM8DG2302804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f996ce3872c6b7140a02db54a8cb117606f2f1e4c533ac2890e5d978f3d0ee6. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:54:38Z), 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/QZFP52365918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55560103c4784b5673b2c568e9a019931d0f013b23682ec6f66df73d7ecf8a42. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZFP52372142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65009d6b02bf64575183927fb791e932ab9a872d4c1fd129dcd398e996fed351. 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/QM8DG2426198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d062e46fba02f0041717e432b4e5298c91c0b7d803070a64fff9c8624c9a2be. 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/QZFP52400454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7c1883bc919e94d5b2b291e2b4d4911b03a5793e2acd4b72142ae27ec1a5175. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/QZFP52433580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd03524e876e77f1cdf405343f7fb0685e5ec94d47028e7170e78c191c980e3f5. 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/QZH5E2417515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0da459d78904b66e24d110ddeef5f3885f9c5d26d4f1ee8e2b9496f2abf9c351. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZH5E2442048.