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 0xc2e88b31a8e91f7f043af98ab77d381b14391ae7483f5f69710fa599c3257388. 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/89911cd4-228e-4532-a2a7-a09f33050511.json and https://artists.proofprofile.net/proofs/artist/89911cd4-228e-4532-a2a7-a09f33050511.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 0xdc1d82b20463fcfde8a068e6bee2b35cab2a86a4d244ce9a629554fb0f7f2bce. 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/ITLSK1700026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf202d2dc1556cf8353adcc476fae93ce3f8772f826ace98d6ae6fb79f2ff366. 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/ITLSK1700028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf878f563884dcbb4ac82fb36a821c3f0a9c42828a9192d95bda12364e4fa5de4. 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/ITLSK1700029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24cd96500f99f613e3caa05943c1bbfa33ec3c9353444911931379fe47c3a2d0. 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/ITLSK1700030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc908152f68f70eb2c94b0a1a3959a6d515209f5eaf2e6fc02883c336cecb7172. 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/ITLSK1700032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf866123e3865c362f60dd322dc690e0fe517bfce0430da4c0e398ae49085109e. 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/ITLSK1700033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d7901b3f029c300d965f2e5ed18fc95d4f0a4bcb35036740bb3c9fe3de9ee6e. 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/SEYTP1616002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x604291b86930138639336138544c622019e5b8d920db6aaa03a15b6359677d7f. 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/SEYTP1608502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44244baa2ab1234f650b06a164e26f82917eb48b6f1f57632e8f55bf37750f0c. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/SEYTP1608503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec00a435c46a0b55fbed0b04baa1b514b7fd3eae9cca6b61c01c8b5c39278b6e. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/SEYTP1608507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ab48f66585fb11756fc8b67391fda5df71c45f67ecd8ce9010887bb14d6d1d4. 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/DEG931901591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30283884f5c700610e749704a6432eaff89161c0035be4b366b46dbfe441d88f. 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/ITLSK1800048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf202d2dc1556cf8353adcc476fae93ce3f8772f826ace98d6ae6fb79f2ff366. 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/ITLSK1700028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3437cb56f32ff856159a07256e7cfea7585402a070942575da81965db82e2b65. 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/SEYTP1701701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1fbd06fd95347858ebd6338c8f9f795b4bbdd5ce033204e4e251bd34d6b920b. 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/SEYTP1701702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef1cbb8be62ac4e90cf0427c9ab7f0bd2c7f126cb7536fe6cf653ea68f57f121. 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/SEYTP1701215.