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 0x30700efaa6c54ff25311d65ff65899ddb3c2e3a4b01a4c80f9dbcb17cbed3ee5. Chain 2 (Bitcoin): anchored in block 953713 (2026-06-15T00:33:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8119fbc0-8378-44a8-bf08-fceec6c65ba4.json and https://artists.proofprofile.net/proofs/artist/8119fbc0-8378-44a8-bf08-fceec6c65ba4.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 0xcaa2d94585baf6ddbd39c93cd45ad673b79cd17517fb6ac68fac8c3c5b0acb57. 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/FRY390410641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd65a8c82959824955187335a051a863012b6cdb545492333553e58727c308403. 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/FRY390410645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1534212b67bdeade93fdfc34609eeeb9cc3625604792a0a84a6073f83eb1b694. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/FRY390410642.
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 0xada33b98f6399f17fe96d14841028a763df3d7c0a100fca70b848d3f6233e739. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/FRY390410647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4e141e4b3f04251156efeea0ad3cf77e78fd355855ea398ecc13491f0ce59b3. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/FRY390110648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2e0fac9f34ac100505f00af92f2973cfbe694a23ca9eddcaf15da7f06571140. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/FR05G1516002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa17c7eef03ef1db226556f449015d47d7ad704c244c030bc7bd0860f1b85caaf. 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/FR6KO1600001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3d280e181a2dfa5796a7565f83dcae392b0e9d5dcc0dfd383196b16cbbdc9bc. 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/FR6KO1600002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd55bbf01d78065fb40bf48dfcbb7e29918f740579e30bbe7eedff0eb7e57656d. 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/FR6KO1600003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d30a978a2c9735ddab28da1a1adf540c02cf4f240dacbc909e34dd9c3c1e42a. 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/FR6KO1600004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9768a39df026d96e9a1aca4439110944909acc9a4a63709c6b4d601b899d4d09. 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/FR6KO1600005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb320f17323d50b737fe960a59b9d2c8c0f09068ad73741c9f41225a4590aa43c. 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/FR6KO1600007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7a797d8dbf6deda7951c8660350ff4e3ed65f0ec35dbd20531bdfdcac8741e4. 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/QMEU31415260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cb017db1536dce4b5c6b2b0f803c30a624448a1775fce16ff5fad4e558c6209. 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/QMEU31415262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x137e04d3bb9160ca03d4cbd816b63f4faf197870f298b1ca2871443ef9860a17. 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/QMEU31415265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x037a71a1affa4c7978db6784c916533bd7e85ae5936b7712d7475f2593c8eeaf. 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/QMEU31415266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf35244ccf89fa38546412df7fd383ee744bc5095dbac80f1d9567e62a10f87e. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/FR6KO1600006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44ee6c9aeabae4d87b73d1c09f719264048f1dc00dc5d6d74a3b5d4e3e327d54. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/FR6KO1600008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45148500b78b0a65590987d1069eed8a335fa6ccf7d4406ad51099151f90906a. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/FR6KO1600009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0af62431b275f4685c294009127a5eadbf3b054d9b176b476236f90d73dce3cc. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/FR6KO1600010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6525c6fb7eba0e8d472198b0daa22501b6a3bf236b6f77559138753df25b98b3. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/FR6KO1600011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeee84c87ba1297888e1f800dfb336ddfde7499ef1168b9957c5f94b4344cd2c. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/QMEU31415261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc699994b3d548be25343e914984ae020c45de5bab18f2bb74d1a452eb1420c60. 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/QMEU31415263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x886372f2d986137452e793c5110cfa038b03db131f1f9f620ecf28a4b45c189b. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/QMEU31415264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3be6c1c013ad2f018d80930417df30f670666fb47aa75df59eb489c9d6fab525. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/QMEU31415267.