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 0x7aff08c360ec448f4b3373948f3042d5f912d794d9389a6b00ff2c0f6828c07a. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b1ad75b2-b584-45fc-85ac-c297a858cd50.json and https://artists.proofprofile.net/proofs/artist/b1ad75b2-b584-45fc-85ac-c297a858cd50.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 0xd7f53351263d2787285d05a19a568ecf6c686b97a35c3fef8dc6db71b2124c2e. 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/QZZ7M2503911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9862ce457be88d73786e3d4831eccc8f27e9235200b861d8dd787114f17efa29. 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/QZZ7M2503912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dea69d42c4d70f48b7ca9a474a717f56697e0fe48e61786b8755afe9d1c0f15. 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/QZZ7M2503913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa4d878f07e72d6ffe262baea24b73dea40fa79b16ea949c7416025a86757c44. 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/QZZ7M2503914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cbbb5f998985bc4466b9414c0a94019e6ade5364cab5f14eb6fdb64b27cdf29. 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/QZZ7M2503915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc98cb444a5d03b3a769a85c92ff8b6aa0753039b82f78d0453a0234a7d7457a. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZZ7M2503916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8adad789ef8fb4541cdebc4143b2a1a86e663f63a05892e4c54ba74d555058db. 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/QZZ7M2503917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x757f70cb421d2bd43f5f2efa5ea6c2bfe65a10c1d3d13a6a56e9826244d2cd4f. 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/QZZ7M2503918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c691c93728d3a409ee80f3a8c443bbb18b01b8cc3e2a2c4ba1d904aab67aba9. Chain 2 (Bitcoin): anchored in block 958647 (2026-07-19T02:36:14Z), 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/QZZ7M2503919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7de3e990381fd1f06ada4eb325263e18eeb66139d84c0ed6f8a2243948c69fa8. 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/QZZ7M2503920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddbed1a949d1249f6f80367638c0c7933b77dbe03225dd17fd35bf3474f2d2d9. 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/QZZ7M2503921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf84e42d4dce672d3aff855d9dae47cc49852794f816071308141200b7510bcae. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QZZ7M2503922.