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 0x034ec35b0f71073b762eda0ec3ae00a81e60af06305a96bb1c2f84571f49ba6d. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1590fbcb-2d0d-444c-b997-0927a5cd9fd6.json and https://artists.proofprofile.net/proofs/artist/1590fbcb-2d0d-444c-b997-0927a5cd9fd6.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 0xc5caa2e169b1ec999356bd5728a07e653861e7c8f60dbcd192004e956dc32328. Chain 2 (Bitcoin): anchored in block 957587 (2026-07-11T16:48:26Z), 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/QMFMF2029234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d78726282e224ead540127ed9a2edad9f54418a4d082da7253cdfd02198c927. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QMFMF2029236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad3db3b7d44083d59fc10e7bf350a671aa434f88eb6214966f24d65f84b64ad3. Chain 2 (Bitcoin): anchored in block 957587 (2026-07-11T16:48:26Z), 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/QMFMF2029238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x698dad706237673f6730108b22df56e9b68bf1ab8c762086acab3f2525ab4a23. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QMFMF2029239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c85ed0e5780a79f76cf0218c7c712a08882515f21b6dbc3c72e8af4cd43b88a. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:05:29Z), 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/QMFMF2029241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff41d855509210698da3114e374d5ea71612ceb6328e4dd3f4b86a1ab52d2aaa. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QMFMF2029243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x081b0504141fea5b25d396826154b4d3c5b5145b8052c6f18920001727bd651d. 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/QMFMF2029245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ed275de2744907da371006351dea29148ac030cc95ff41550ac7727b148888b. 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/QMFMF2029246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe48a8d2a85be7f701198095cab76c44cebb597adac5dad0d982feec9ac019340. 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/QMFMF2029248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ec1f0ebedd6d32e7560b0a4a9c1506295d8263c4dd247099d4b1887318557cb. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QMFMF2029250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59220bdcf5c834a7b7c7339218c765c776ff0413b3e59e12aad181388506ab9e. 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/QM4TW2113368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef8c061a91de5f86e91d818bb0f604d5e40e84f98309f12c795e91e42934175a. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:19:20Z), 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/QM4TW2116454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1c4eb2d5701004207447d6bb75172ea43fa3317369425e891ebcf89314652af. 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/QM4TW2116459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57d9b76d17697f2a81dbd4dd2e25cf4002e37935ad94fa86bebdf367a90fda57. 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/QM4TW2116463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x269bd9ed59210a7a26d1b8286e8cc94b3c87890eca1fe888766353dc4c7bed9d. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-17T03:17:34Z), 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/QMFMF2031515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6372f13d225137a23772b86459969ef1444acf77fe8b857ca5d6a10f640f1272. Chain 2 (Bitcoin): anchored in block 957668 (2026-07-12T06:54:37Z), 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/QMFMF2031517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x952bd4471aa8b89e71961880c912bfca14652a24afe7aa22c8a5546a02650943. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:18:03Z), 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/QMFMF2031518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8784ba9fd704a621eec2f5a0f2034ac8b52165a8e9b17ea25b415ed9a9ac908. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QMFMF2031519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x027d97ce5500d261b1b5d432c6e28af340a5e3ee238e447afa4e734331d26bb0. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/QMFMF2031520.