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 0xe1c2cc6ae4b0cb61b599fbf857c81ba55af87a1c63b6de2e560092758a6cb7d3. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/478b33ae-3552-4815-abf3-97af958fdd02.json and https://artists.proofprofile.net/proofs/artist/478b33ae-3552-4815-abf3-97af958fdd02.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Findin Nemo (feat. AK, Trapfit & Splash)
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 0x7b0c6d81e845b213382b518c5f909784e0ee0b78d2248c240d6e77cb899e9b57. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/GBCUW1900130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9d48511bc270bad399cedff57b82d0ca47d22fe33c178583b233d278bd1d4c0. 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/GBCUW2000041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c9f5ca0e629af19205f728d20a61fc7726214d592605dc637a619b3cc650fcf. 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/GBCUW2100080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5342aacab057e99cef47a0f59cd4c3f816a630e1c0f5fbf635572f7d0f4cc917. 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/GBCUW2100081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x359bdf01f592b1d5cb82d76c8d2969d68433c3d0a62b15a6c419840a65ccd398. 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/GBCUW2000062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x990d7725218ca3762fc997047436924c7a2635de4fcb033c4e72547131aa5694. 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/GBCUW2000052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x172f918a34d7be54b8c72fefa8d440523ad4c356ae75d81cccb49779f6a30d36. 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/GBCUW1900129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31cdedb0276e5f86d1df8bf5772cd35c7a979dd04ab99cd5bbcb37bed6bc9963. 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/GBCUW1900103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9406c78d1598239549bc3846e666e4286b7ad600ba7abcdecdbf02ed5d0f7b71. 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/GBCUW1900104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7427efb9196b2a885a817071b48708cc500b6a26288509efb47b5babf3b44ff0. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-07T11:02:43Z), 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/GBCUW1900105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5742cd525a6d67795d5c2731273ac15b12c50970059bda143bae329a19c96341. 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/GBCUW1900106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe263fd2bdb079afda8ee4f09a5dbd4cfe96f57fcd70683a841d60b998338875. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/GBCUW1900107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd33607a416a581ad15b602f094c7a7769aa9434441f6fa7b374787394d4135db. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/GBCUW1900108.
Litty (feat. Harlem Spartans & Moscow17)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd93db1863cc8b9850258371e81815290b336bcc1069e591f5c1b1c44c21ef04. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/GBCUW2000048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60b0d7ef2cf33e02af0a87edbc0097276963c1d6954067f4a918e4fc5bf5cc2e. 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/GBCUW2000037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61e39918cc04776b4cb85b0d477d312d4521ae2e4a75ad77d70f29a525513121. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/GBCUW1900109.
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