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 0xea1ccac6775c6fc8ce6a3a790db7c336cb0cdacfe5c1dbd054c15e1473f5eee3. 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/a931869f-b491-4f38-b5c2-ba371884bd13.json and https://artists.proofprofile.net/proofs/artist/a931869f-b491-4f38-b5c2-ba371884bd13.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 0xe4d82e883fef187a80851fa256a19f5adc5d612c805b917fc1786a68c3d3d4b9. 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/DELJ81503951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91450563b0ff6331170d90913a45da7859177e92f7f0aff17aadd3579bdf0819. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/GBSMU2339272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d9ca6848b3c01d4b01251e7fc9943533d2d6a4dd05c6b5a638ede2c4f6177be. 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/DELJ81627759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d82159220fa6eb885b7d50f5c9974abcbffefe6c1ca9b5a9e2303b773456d3e. 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/DELJ81605091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f8995fd64ba45902b018d3c36045fa3f1f7f2d81ed4dfaf881a37d3df20bfb8. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/DELJ81737909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a615ddad349207620eea985106c1a4be9081893fd956f028b2f71532aeeb53d. Chain 2 (Bitcoin): anchored in block 958417 (2026-07-17T12:56:50Z), 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/DELJ81745154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf97bc419e79880b924a79f97fa789f95f19a19c45b4a83ae78270043006030cc. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:59:49Z), 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/DELJ81749094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dd35093134a5c0f76d072d3e0751b79d48ceee1e65249ae689e4c7f6cea8f96. 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/SE3OH1521424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba9be4092ebf516db047c0c62677ae6550f5970af2fa4178481ffd57dba4980f. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DELJ81769067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebaaa7957848d5fecff5327bed55b7fa68289f4c07e4ac6a52d33c4a54bef3fa. 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/GBSMU5326784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54866acf0a3a9f29e74bf23119c9d4f83cabb8b2bd156ddd8cac61a353cdb75c. 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/GBSMU5872584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x361db495d8007aabac87a08036d23858f6938ecedd6a8b301a30f1685ae80e7d. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GBSMU6614115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf0ec073159c3f27ae81bde941c0246e74f11a2f5d7bd7dd29e5a11d1869ab5b. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:39:38Z), 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/ATEK02003055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x717bd4705f0162684da9778b260ccc5640367e5affaa76f9cedcc5aa718a4cce. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T10:09:30Z), 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/ATEK02004059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0c85d5081969c2791345633f3a92202a8dfd7878681edfa184c0f7630acb646. 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/GBSMU7923688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa6920e4edba38913cc7ba22d9b7bf4638193dc9b828f0d3a985023da06384cb. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/USA2P2018462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72e844c14c576384c79bbb3f393fab7aa38029bddeef39e3183007b56269cfce. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/NLT2H2100121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06b2ec72d29c5bf86d87219cb49494e12ab501b96d3b73e4197d09d644fd7e7b. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:56:11Z), 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/QZS662185463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa841214d8a3eb2ae850ee85e60bff9a0f3751a553b1de3274813d93df5495ff4. 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/QMFME2197438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dee4a89483be813395d65caa55d986db85bcbe6bc37ee288692da6c407945f8. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NLT2H2100791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e09b3cc6fd7219cd59faea599deaacd4b16a90b1b884c47e2b96c62f5f1a4ed. 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/QMDA62162302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbf241d23170702a44deb1ae1b678cc6f270ccb0549fc4771dfca02695818dd0. 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/QZMHK2214921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6d7bad5154ffc2148dcf55290dba74eed4b79170b1ae04a42f4f35028c8209f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QM6N22295039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45e33af795eeb7872bf4f471471955be5ebb990e744fe93278d92c1f72bf0dad. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QMBZ92261857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd40996b25511e8c841ee9792e74b42cd382e754e61261df5903c6d8d4c666b3. 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/QZS672216113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a6dc34d1d940b8dda689f46e307a128464edb2b08132f111969c506a43ac291. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/QM4TX2290462.