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 0xd7ac49ba48de3cff007f948f24bb037ee4af1faff30507f66700a39b363ee7db. Chain 2 (Bitcoin): anchored in block 953817 (2026-06-15T18:10:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fd7a0c6e-b7ed-47f0-8056-3280121406b7.json and https://artists.proofprofile.net/proofs/artist/fd7a0c6e-b7ed-47f0-8056-3280121406b7.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 0xb1c3df027a73b3e7ab191379323c714da43c2d58589a718c37b09ef91ad3fd6c. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USA2Z1210640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a052200ff9a4d8acd9a2dd00f4639a630f880b83897c0784354d23a375c343a. 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/USA2Z1210641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83d8e94f91bd13024acc884c3843ff3d30c5faaa0affca8198be4053ddd73c97. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/USA2Z1210642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ddfb4293ae8fc60fb2d81a791bfaa9607f6b6a3d91372a8b2e65b660989d6d6. 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/USA2Z1210643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd0ac11292678058c2d8bd1033d467f4a229c95f5c056c23c18bae9520160de9. 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/USA2Z1210644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19cb2196829a24ff91090ad7f7c1b455f0f4a56f78ac818c50706cdc679dd739. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/USA2Z1210645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e5ee6ec57a478d5de19b13869c3c2c849ddf19bd238d182aec2dc106db58f0c. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/USA2Z1901292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2bdc8e0b32dbca43335601917c74f3f2e601b61fd99a52f8f0cd5870b079eff. 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/USA2Z1901293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0543a82eb9ba6f3f1b3c7c84cbf26814d6a9af0f5fba5ce8eeca00cb059fa6cf. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/USA2Z1901294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bd353d44c3fedbe61be4e9353f198eba004cc339d8f747ce1e75b5d5888d2f3. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/USA2Z1901295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd46e54a4b7d35151d2dca2daa9c2ecba841cabbac4acb93f2ad35f5c538ba514. 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/USA2Z1901296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x412929b2a2566a6e6ecccd1f6a6e931a58a49c363d6d85f4a6bcf5d57d2fbb46. 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/USA2Z1901297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32eeadecd828a6d2e618e4407db5bcfbc70ab45d2663425373c25e1ba57576e5. 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/USA2Z1901298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd02d042a9be4769eb7e2be5bf4cba9178bf9cbcd2d3dcae2a3a4ef78c1903ce1. 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/USA2Z1211602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22e141d99a7ad26a3efa05de2dc68ee83149d8854a17bf062e47820e31efbf9a. 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/USA2Z1211603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c1096dd4d2b03aa661ec6a9ced2ab67d662c2fdf6dd8782ae3b96db1b22bae5. 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/USA2Z1211604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc346edbf0b8199b103b6f546e9490605add6b02b7da604868d32c9321f3c545. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/USA2Z1211605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88cc28bd1f9105a4ded8f55e78424f72544f8402cecb42dd7cfbd0935c3adc68. Chain 2 (Bitcoin): anchored in block 960187 (2026-07-30T01:34:28Z), 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/USA2Z1211606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b777983acc1d65e2a7ae879c11bf032730bd5619aee456c2f6224d51893ed17. 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/USA2Z1211607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcecd60a6b1fc8fcc05d9e353c7b5cfaad64bf34aa9601d3106893ce74d82d2d. 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/USA2Z1211608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x474f9925860adcd3a906a3bf67295276152827a4c7874a54284da232de102fee. 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/USA2Z1211609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eed996560bbf896a24d39decaac24a5de3d09ee305220bfdf9674b1a22439c2. 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/USA2Z1211610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0078bf5bfa407e7bbaf1c5ef5ac5fa655cb510e982a84af1c74eeee3437d64d. 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/USA2Z1211611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe24f87caf2064d4ce69f2c5948ea9fc3a7a65242857af761000339d06bd2068f. 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/USA2Z1010557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6656e4e987070ddc6bcffd8d6d5745186eae55eec489dc28ba8c90f41e83a09a. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/USA2Z1010558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x477691625b2e07f711ee105601a7f1d709ad6501ca60641ed3f95f22598d2973. 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/USA2Z1111052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fb4527c904dc92ecdc72eab1e5850eb038e050bbfb743a57085981b4305860a. 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/USA2Z1111053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x211ec160b564936ae6963fa509c2d1eab782854d078b2d9f7069b38674594bcc. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/USA2Z1111054.