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 0x23c43678a024197f3cf78f0494c4c190ada67b2d8f9c4ff008885f0ddb05c05a. Chain 2 (Bitcoin): anchored in block 953819 (2026-06-15T18:31:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/feea5b95-9c7a-4ec4-b269-53e5f977520b.json and https://artists.proofprofile.net/proofs/artist/feea5b95-9c7a-4ec4-b269-53e5f977520b.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 0x4d9b8d4f3ab6416e0a5c2b625998e92ef03ab2a4b1fc2f1d2321aa076cf7e4b6. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/CH7812237123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b829f21d5331a703823d1985f459b64ed911eb4dbab19e578cc8faecf1454ff. 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/CH7812237121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x757423a61bd7ac4ae36c99e29fbc53705d76da30b80531c14f537e1b7dd14d23. 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/CH7812237122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94eb2a9d6926d06ec739e5d91c9d45405dc528f89f0c797abaa54718216cdf9b. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:58:44Z), 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/CH7812237125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf907ffcb13e4b47f4dae8381b1faeeb6a014686ce913ce8b26df0f595f5e0b7b. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:36:33Z), 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/CH7812237127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd5242c6eda4cdae87d595907bc0c28e85846727c7205eafad822eb01bd7e403. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/CH7812370966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x444f11b69b59eada036f781f1bc3ec6b622fc211a7e7699b05e8ed0e51934e5f. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/CH7812402736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6773f960959af98a3ded073e6da7bb540c99b2914c23a6b6b3ae89e6eae6912. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/CH7812412275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0f9914f8795c7cc3d838532c4069726f8fe3812a7f807feed005e92b119c507. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/CH7812423598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec7c59f9e2f8ef0730a333317042e6ebe8b3a79ab5b9ac27fbe4f4957928a228. 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/CH7812531049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5025a9433134300aab404421df7750f29f5af1ce39e0a1bd39665997628ae4e1. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/CH7812534359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ddae917cfd4633180ecdd188446e727c5a91cbeba06c781a6b19578e044c21e. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/CH7812536519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2fdbb0e5840f563f35316489bbe514b0ffab0901e08116e4eedd201a65f53ed. 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/CH7812544634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb0863b431c8591e317c56ae96c33c05c58602143e0a6ab6afb6947c039bce11. 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/DEPI82016532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82490bf43d0c4607cc31e7a57aece731b2c38577a17a2fc69e709f1ef52caa41. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEPI82016866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7195eb6c16dfce7032688d15a983a83986e0851bf440e5f0040ff79fea9ae5b6. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEPI82016868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x381e19f15e6929b7eee654e72ee55c78e50e0e5b61dc025bd5ab51491325c38d. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-22T05:30:40Z), 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/DEPI82019076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb0863b431c8591e317c56ae96c33c05c58602143e0a6ab6afb6947c039bce11. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/DEPI82016532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa05704cd6ae643df90a3ae1ca412e1cceba96783371f2c4dcef54ab5c7eead7b. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/DEPI82016862.
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 0x1a928c31a21f07fe31efc0a5433cb014274358bfa770433888a594083fd4ee48. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/DEPI82016867.