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 0x3db593a0ee96d207b4b2cb8f0d12d3522e8518da86f367d87f02c8602e3041be. Chain 2 (Bitcoin): anchored in block 953654 (2026-06-14T16:26:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/48747165-8c52-42e3-a9a1-d254406ad71c.json and https://artists.proofprofile.net/proofs/artist/48747165-8c52-42e3-a9a1-d254406ad71c.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 0x1bc7f11a7a3069a61abc0b44091a1313964a0ea1cc3377837e26f84ab51d0c70. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:50:21Z), 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/QZNJX2114949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x532e827bdb40b7f296451d4801ef3a6e780c511d777024c3f636c066bfa72f26. 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/QZW9M2311471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd933fa27072eb572f149e77799ad3278b0a5716c555b4d5083ffc088af3f491d. 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/QZW9L2399698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb432f8037341c840cda95a65ef186600a697c26b6366f5938caededccab1b59f. 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/QZW9M2322084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1929e2803ae98b285ff3ad0850125f7a833237ec94bf3f5d18c1cbd33873ebf0. 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/US7VG2431110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49d22401600e9c9eb80f94614116eaead406601aeb8132c8e2dc2148fd27bc3b. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QZ5AB2498980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbb1c74a943bec631b1b89b0fc2ef7395ea17a34e6ab1ed8f5fd355fbeb479a7. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:38:22Z), 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/QZGLS2454489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x557c6b93fbb20cfa1483e6f2ecedf1bf96da5027ae5ef92fdf16665bb9bb15ed. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/QZNJV2443591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa56a3cddebaf133cce489dd6ac9718118db14c868162873d32adf6021ba9bfc6. 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/QZNJX2464214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf53e9ac381ebd574333bcfa201480c4c9e1bdb5ee4efecc0b4fba29af2380d4. 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/QZNJZ2461305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43bdf0a4919324f84a17241c695a279d9a80147c331231344e86b178997fbcf3. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:50:33Z), 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/QZTVM2421488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x550fcbd68c7cdda210d55eed482c7f3e68a5665797e4bddbc8d99c299fa940ce. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/QZNJV2554201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x711ccec0c201871f002ee51ee70ec8ec6a480734d5d8c3eac20d70c47d1dc2d4. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZNJV2554203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x920e9882c25a5a05b753a930e1919c63a19816f87fbf2a9e5a59b12b93244404. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/QZNJV2554205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd589e912f195ba838c59673338511adc578bfb1c2fa9ef123a960ecf23f3fe38. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZTVM2532835.