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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c652fe2628bfa177782d1ffe06889ab2f323ab55f56d5cf51021eea437542b0. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fc1520fc-ee8c-4a2d-90bc-63c1fd00156c.json and https://artists.proofprofile.net/proofs/artist/fc1520fc-ee8c-4a2d-90bc-63c1fd00156c.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c334ded93e15282dea365b6d28c3ec8464a7e753c5eea7f7f95ed9b10519bd4. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SE5Q51822630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e3071faac2e66a90d9971af2fef1135371343bff909ee5123e79e4c86e098bc. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SE5Q51828425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2723f380bfc5cd6588424a63d24935d7ce3d245749c136e4cabc2f85295072ce. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SE5Q51818532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4b7e36534b9d3cf87b9bfaeb4a06c3d905c23c9e58540e144a79edc5fcd4efe. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SE5Q51828685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a42874d0a8b21826d68fd1e3cebb06d65ce2573f99bd32ba8b359ab57a59bf5. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SE5Q51828627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c1601af662e24abb69e2ea1dd53802d216d5e89598426ea30677a44c9914d2c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SE5Q51828687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2808ef72d4a989ca345fb5eb649afdae5cefe4166126457b9bf35351b6add397. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SE5Q51828790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba26b4ef98a170e118b1ad42dbc842d1edf7005c0fe42a94a05639734d00ec2b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SE5Q51900092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dc736780f3b4f9a2ca70b8a8dbeec6cf11f67c759229bfced71482050c0dd1d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SE5Q51828746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9331932cbf3059344d25581df959a0d0a92d3f9cc856aafa822474fbc30fe783. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SE5Q51815655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeffa86aeaed6fb020f3ebd88339c09a10317bd6b02c7c4942612f7469e688c08. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SE5Q51821873.
Epidemic Presents: Crates (Blanka Edition)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a2af0f9cc40223a16016d7b50c0351478d14281237715a760958ae9112dcf2a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SE5Q51812348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb533b3edd2b250caa3b5649340cff250392d4ee78e7a385230f704a6d8ad8934. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SE5Q51821784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2c76e4b42027e833f09e80649f658efe9231f8064095373e687b0ab84d09353. 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/SE5Q51816313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x737dc1a3bbc96762fb57f9de9c83e95bfb9ddcf010ab36ca721c1131a993526c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SE5Q51814530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0a1df6eed3678b29acb99725805394e8f1597e6b1b78a12bbeeb9730ea1d6f7. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SE5Q51828509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x134f1ecf1039278f62503e75ebac6fbdbdca9b2da52a673f7ea52e0e1b20924c. 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/SE5Q51828689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75d84514a6498724f81539ea92593f37c0a5d31a8e3869575fc2fb915a295fd9. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SE5Q51828629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x344e2ef3e356ba8b3d8278c3601c853664a6c0792254a1aece89b0a868576f64. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SE5Q51828787.
Epidemic Presents: Crates (Vega Edition)
Can't Hold It in Anymore - Instrumental Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x303d014a145c9e91d4c4a48a6f9bc6e3b13f3bc7a6ab20e42c3835267d5c9bb5. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/SE5Q51900181.
Epidemic Presents: Crates (Guile Edition)