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 0x5d98390b5f7126112f2ee84ae6054b65861e875bbf5f7a227f159c3beb994f3b. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/03ffd251-ca54-47ef-8e89-0be7c84cda80.json and https://artists.proofprofile.net/proofs/artist/03ffd251-ca54-47ef-8e89-0be7c84cda80.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 0x109888376931dbfcb7c6e1e5b69c3f926d55c2ea73b870333695c6952ae6cf1b. 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/BR2X72300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78a03a497887cea07d208a7638bef0f4dab6236bbe9640640830c172298ccfae. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BR2X72300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2c0bb73e3090aaac3cadfa391b5e27f05c54d5017f1646ae02a4fa7a620b43c. 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/BR2X72300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bef2e0245236fc21c8ac310d581788f5278e714d30ca9c17c548571d4240be6. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/BR2X72300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9985f5d1631a07cb7e31c4b90e836f5404004249742802001b9687e1803f3f09. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BR2X72300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb363e0a3706ed62e09ddd69848e8ee4c13df7a63e96c3c3b84941361059cd46a. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/BR2X72300002.
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 0x6df1b2bb44200ea113a77ecf5dce5be40c398b61e734d1ca41dbccb1599c3288. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/BR2X72300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ff8fcd28bbc053c2a9fdfa6ca6242a28e2d35e8abd8219add31861f55d622f6. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/BR2X72300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70f35ed06f7c5cf4e26664103a858e64e5cdc7289b97f837faabbba0a7a09ebf. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/BR2X72300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c0475672b3b1f939017540134b08f1b95898ce814384bc28686c7b0c9cabeb0. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/BR2X72300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec3e73478df0e526361d4d9c4bab2c5d5a8d00545b16dcefee1ea019ff7ff4a7. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/BR2X72200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25ecb2dad2e08290d223191f8797ec5437020c143cb7b8f8330da17d56a0b02c. 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/BR2X72200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1a18b9d3fe963ce06faa5d68d9748a37160817d376b0a02b48c5d092ac0d828. 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/BR2X72200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba09966fe568e44b6626ab00e4c29a34da870776696a01067167b66c725ed0c6. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/BR2X72200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5c21c30344cc398defbf962b63dff07f5a07002d364a59e6c717ee4696f0c1c. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/BR2X72200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83e31decbf7df9bdc875e8c62abd6979eb05a558b9427da417e799a47edcc065. 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/BR2X72000012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd8fb7bef6e5149b441963b41287d55245f3dcd18025f82d2e376367c9a4e6d0. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BR2X72000014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe88d11cfd066461961d4dec88f34282f77c20dd44e954342d3ddb09fd17c643d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BR2X72000017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6768c819e4f20319aa6b1eb628df25193b79e0a2d4d8be8da37b4cf372bc8ff. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BR2X72000019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef55e2282a7684da298ea65e7b75686ada9492b0e185826ab0f86f7c05fcfa6b. 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/BR2X72000020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe296d10cf4d1a96472e76deb6a04a1362a8ceee84e350ef55b2c4f6999c8f905. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/BR2X72000011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc04fc3745f4a848220f4f9c42b5d313a3616d531e81be62c92d127d11cf9a18f. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/BR2X72000013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75484cbde2265374a9f7671a35235117451ad658dea559d1e60c13841a1f5703. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/BR2X72000015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01673753299fbb18ba98f91cb75823603875d82d6b1fb7ef253c98dce2103e16. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/BR2X72000016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23e36942ef21c0115581c9d5cf252d06c3d6b116e29fa56e170ac52d06022dda. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/BR2X72000018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fa298b76f8e1807528b907924673d966c7640ca6df0ba205a617dbe02e6212c. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/BR2X72000021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77a6e96b048c5427ccab2f3f9f80fe1bdcab3a17869613a7c5ce5690bf6c1610. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/BR2X72400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b0b293027a128449f24307156d27cee8c0caaea7a8675241bb742c0bcfb63ec. 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/BR2X71900053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7091ca2bd8dd0066377137a62b40b7d884c9e273488327a5bc1ebc2d67e2f813. 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/BR2X72200001.