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 0xec62da875c7d19e6068449d00e717ebce44cf39428d0c13e6887a0f817aa4dd5. 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/50094359-75c9-4eba-8bcd-78ec1e089170.json and https://artists.proofprofile.net/proofs/artist/50094359-75c9-4eba-8bcd-78ec1e089170.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 0x6d5c881652bdd5aab7509d72c728c92164f5b7cc811660f2b5d83e28f787232c. 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/BXKG22400829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b6eafb6580e03f7b636fe26ae422c04bcf09910cb03c13b51edc9376aefeac6. 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/BK2242401364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc437852828a2ad161c6a4a5fe5c685a8d3f920ef6cdcd69ab6790f39cafe32da. 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/BXKG22401176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad0797606515afc8d514aa508d4b878a2bd2cd0d084de917abc75dbb8bb60b37. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BKVXS2400236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cf54d3d97cf4ffa486e646d99e1f8fa6f431805482edf03461f9caf55b142c4. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/BKVXS2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17828f611e60151456985bb32ff87ea42549ede7ffd04567bd3ed975869bb138. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T19:54:29Z), 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/BKVXS2400170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa06612e174653a8cadf158f0317b56133a191c0d449f65d67c36ad3d50c154c8. 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/BKVXS2400171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b7554910fbccdc9df5c07b87d8dda266e7e022803f99b9a35e94f24f70e84a6. 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/BKVXS2400172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x575b117cef89fad02e396f4bc09acc86dbcecf984d74e90d3f7256aaba7346c9. 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/BKVXS2400173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccbec9f0dba947b009184d6d2b0262cc9a2deea8f0d2a1992a44c67c6d70e7d9. 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/BKVXS2400174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x283dc827d569ecd970976a980b6b89c062228a245131a33822a5fc573c0e4201. 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/BKVXS2400175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x101e73ae50d3011342b152e4f3cb4a2902e72a5571f68ab55b50112429593c9d. 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/BKVXS2400176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99ed568fdb675cdd044f2b08f2e935b104e40ae31b96b854ef87759a7c93fdcd. 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/BC3PG2500081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5db3592aaf296662ed60b390c10cd5c93a20a6b47336ca7a91034ef3e25c76ad. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/BC3PG2403034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7be77fc7aaf779ed2a99fce9578dff850c3b6de13955bd234b96d58771e0af5. 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/QZMZ92497873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5f1c4f3ecadf18bafa2ac22c1a0ebbd17396576de831cd2ed0affb15610415f. 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/BXKG22400578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14e31a1d69704c802255bf1cc3ef081811a5cbbfe852786153aae955c70e3639. 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/QZNW72306813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fa491d7869f1a421a51a47c72e62644226629d5280799fa49f385803a67feea. 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/BXKG22400776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c359f119db5ebf2f5e2a379450e788aae3ad610f4dc449aa0ee1f68bb3ce37a. 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/BXKG22400777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x551a462624f91f23df2c572fcd393aafb1058195b07b9a98c4a2786dd0bac6df. 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/BXKG22400780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x123fabdda5bb5782881b16d6d517d47ab73466bc513c8ba23a46b01c25d80fa5. 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/BXKG22400778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ff0fc0a8a976f732125a9b5063b1ca8796768bf8dd7545148b4b1e02a0bad28. 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/BXKG22400779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1421997951859c25211c81909474f60237b1e04b33dbcd21c48bdc938e7a520d. 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/BXKG22400253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc77b699a1ebd3e69ccdaa9f7a62c9acf1ee8a639d1a878365f8a87d91fb0c993. 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/BXKG22302786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70b5ef1de71f5ed60792c9cc45d1fccc6a0997168f6cfddb28ffaa401d581410. 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/BXKG22401973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a7e10a1b2c8610a63c3611b775df1395bcc56eec557a705673ecf70ca3ec5d3. 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/BXKG22400866.