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 0xdba18346f7d273ad8088490d37b0787103a580161f828bb877f6d400b41c412f. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7b2160f2-f870-45c8-b3bf-da43f6b6381a.json and https://artists.proofprofile.net/proofs/artist/7b2160f2-f870-45c8-b3bf-da43f6b6381a.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 0xd75b8e5d6bb1bd26991a4d85ac611082627d7b2ab7bb49c1ec3200403bc9ef63. 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/QZES92264419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccea22e58bcd91a87a8a2f422d5443f943e9e430e7f927782d1ffa8db18fcc82. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:49:44Z), 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/QZNWT2295413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x893a384618629369b638d50043169f427544b1498a3443ce63c6316971616376. 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/QZK6L2202306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc7f9f7115cbc1db33c801cedf642fe047a2cabcebe120d55f7e72a6de46cf20. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/QZK6L2202310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c9180d20ee689f1615687e931fdd397812e6fd6acdd66861fa469d3e0cda8d9. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZWFG2387798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa83aed68b34c241500931becf7704ec38426038ddd6680b4fd283c4e0295d9c. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/QZWFG2387799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79e35ac6318aff8165149b9c25f2e5e8473fef32e01e92a35613820f67c77b24. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:08:49Z), 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/QZWFG2387800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06deb5ebdac11a1f34a90f9fd23a71b9e73bcd9bb2d1e58bf4df4064a4e79b0a. 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/QZWFG2387801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa77a6bee0048abb7c5d63b5c14bd7575569aaceeb07708c66be6cb2c27c2472. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZGLM2405403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d4bd866a64c3ac021e13ecdbb22be11a4f2ec2ad736157d4e1ce5b5d59643ab. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QM6MZ2410976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c097772940787a1623714b34a91574bcf3292c1d6fda6ec7fea55cd55471085. 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/QMDA62483186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03be54c4168e5362875af46d3a962291c78b6db0ed749e0729e1a1d5d7f7861b. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/QMFME2486732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc325c9e082303333295212fcadc73c82a8989475ac0d57c394394d62ada6cf5d. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/SE6I32430483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x070a5a46aa7fcc25ece1910572ed392c85d1da4d2b57d75f9d9f50e84579d074. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZES72409677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb5726fc5c6db890539bb9bd0860cfc77e5b95b084c32be4266e536128d133a7. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZTB72354678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x555c3130bba22246403f26cfca201c8741b77eb6dbba2d9a959862b4a8dc4a44. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QMBZ92344328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeadb6b922638f1af2f0a8d33dbaf46ae747ef448c60e376ea1a2ae1aa58aa2f3. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QT3EY2403571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86620f22b169ef893cc54179bb2cadeefe9c137774a7b018570e731de4e8b6bf. 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/QM6P42576875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d1ffc650f583ad2203293fadc168b0137878ff3b9f2f9cccb4e2051c3473557. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZTPX2430883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb5726fc5c6db890539bb9bd0860cfc77e5b95b084c32be4266e536128d133a7. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/QZTB72354678.