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 0x863bc3900a275266550fb91615e291230d38f47636d6bd93942917176e789290. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/74c787a7-5e85-4fbc-9314-b33f0085d9a4.json and https://artists.proofprofile.net/proofs/artist/74c787a7-5e85-4fbc-9314-b33f0085d9a4.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 0x8edc7c5d6d66bd9dcbbe8507ea1d12caabd5bb1b06748874497e6c46b38119f4. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/NL9TL2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x533090df4fc71f6803d89a170e7fbfca442aff24aa59d87473b85efd7123e54a. 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/NL9TL2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52a884aca77e5c4a0a3434e4324e85a21df61d2a56732dcae5c598b1360ae6b0. 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/QZES62437985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cf0445236bd106fa0d5acf1578c984ceca0e0b48d4d259fc0c62aa50d5272d7. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/NL5UZ2407488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf7854fa344cb277eff946be83a660d756a347d2524d29b822154881ee577e0f. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:28:21Z), 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/NL5UZ2410899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef5d2df80167f7f3dcdf628c2da21ad001071300f0b8fdbbf700bbfbb7900ee3. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/NL5UZ2414372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf24d0a14e7cb6ee49453b1dc1dbe3517a7fb1371b366136b87e42484080f503f. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/NL9TL2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe7237151453ee1f7130e70133930dfa4b8d76fb2d7c13294dbb7cbc2f33c2a0. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/NL9TL2500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf24d0a14e7cb6ee49453b1dc1dbe3517a7fb1371b366136b87e42484080f503f. 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/NL9TL2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef5d2df80167f7f3dcdf628c2da21ad001071300f0b8fdbbf700bbfbb7900ee3. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/NL5UZ2414372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf7854fa344cb277eff946be83a660d756a347d2524d29b822154881ee577e0f. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/NL5UZ2410899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cf0445236bd106fa0d5acf1578c984ceca0e0b48d4d259fc0c62aa50d5272d7. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:49:10Z), 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/NL5UZ2407488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6037dfd42b8ea1dfb9af31e180afbd9df2185d8959f7bb0f60207c3a500ed95f. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/NL9TL2500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe7237151453ee1f7130e70133930dfa4b8d76fb2d7c13294dbb7cbc2f33c2a0. 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/NL9TL2500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf24d0a14e7cb6ee49453b1dc1dbe3517a7fb1371b366136b87e42484080f503f. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/NL9TL2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9324d429544c3ed836e868011e6357469399945e7eb13e89c6fbab24e5fe80c. 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/NL9TL2500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b106cb1e3551a3d4668102f1916ec33dfaf39afbcb03e80e9be4fa6a0978711. 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/NL5UZ2407487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cf0445236bd106fa0d5acf1578c984ceca0e0b48d4d259fc0c62aa50d5272d7. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/NL5UZ2407488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb977536b7f6d481fe41f44d731ce91a16ef394bba0783313853ba6faaf00f81b. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/NL9TL2500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb977536b7f6d481fe41f44d731ce91a16ef394bba0783313853ba6faaf00f81b. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:37:15Z), 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/NL9TL2500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2cc2b57e4b67886a15f3cdc3255e3e514632f61a28f15e6b19963b3c91a0b9f. 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/NL9TL2500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd1bd41209ee8c58680b29a39c93fa9cb707af96600894965ba948cee8267143. 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/NL9TL2500012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29f850d21c9a1d00b5ee720409137332c6c72e3f5ecd172b3d7aa4697dae0d4f. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/NL9TL2500016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1d6a14bceeef96e21c8562f0d98f73af41adba4f9d9284ef23cff4bb10621e0. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/NL9TL2500102.