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 0x6f889bbc9e7a8a48bf0fd221521acf66d66d023a7a1e8ca26b22ae040e1909b3. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/40e3049f-9eff-4a08-bb4c-083c36303988.json and https://artists.proofprofile.net/proofs/artist/40e3049f-9eff-4a08-bb4c-083c36303988.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 0x468f8e4d98afbefca72ae025d994b0e2144946a0e4563de1e9c41fbb0a03dba8. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/PLI366261530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3178f00e6e247d88c7c6227e0906d43a23284152ecd37bfad7384bfe2cacb3bd. Chain 2 (Bitcoin): anchored in block 958865 (2026-07-20T13:00:58Z), 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/PLI365947800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3178f00e6e247d88c7c6227e0906d43a23284152ecd37bfad7384bfe2cacb3bd. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/PLI365947800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fbd8e2505c4651715f89c082272d482e0310e304a18a304fa1bbaa493bf3c09. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/PLI360195750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04c9b1f9ccb8a8d3f12b32d4b6d8867aece4eb6e66c143d95083a679aacbbc7e. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/PLI360195760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x321be868dc9f1dba2fe9e54506099c27a80e846ddb3ec5acc8d8b45ca4ea24b6. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/PLI369010880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x468f8e4d98afbefca72ae025d994b0e2144946a0e4563de1e9c41fbb0a03dba8. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/PLI366261530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd671472e84aa2a1d9cb22847f59f1dca0d29112e7a5e36e8379642694b73325e. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/PLI360195790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17f6dadb0ccbd7c37064043303acb22ddb897756f793bfa254c6b185501f4c73. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/PLI360195800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd03803fac5894be3d0c8e828c90ef85090b4d067b098f9caacd50b4831ce16f5. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/PLI360195830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99d1c373031fa3f0eabad0c7dc16e54591fd05d303e54dd80f55986a565f936a. 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/PL37A1800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd2691eaad6c436e968d0f2a618303da831b43e197f64f6b9af8641bb9d12ec1. 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/PLF241603692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cfef4064cfbec89c2a908133057d0a3340b9d19e1fbd3176b5589f1a2c16a5d. 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/PLF241705419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2125330b4a9bf6dd0f3b90ee19d346537d37f3a9c46f8e4497980dd331b981fe. 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/PLF242210838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f005a800bb533badc11c3fb799f59871d394b3f65349fb7e0bb4a53f38af0ed. 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/PLF242210839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75b51913adfd7d5bdcb81a747c355fe267d7704dc44ecbfe46c8d251a3725f10. 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/PLF242210840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ec1096ba7f0bd0e124a1121e818826de8895ce5ecd9d5396e74a6357e4ebfcf. 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/PLF242210841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x938156d4caa60ce8ebdd644c74ca8826cd41236d905fbd7d47fb5a432f2604a6. 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/PLF242210842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x166b234e445a587670917dab48443b2587ee95081e99ae725131612066f34116. 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/PLF242210844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cac3132b1656aea7a7c830d56ec9e4d8fa08cb27b8a0b17c48b47ca3ec8ae40. 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/PLF242210845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02a2ebb9153472fc445ca40d6ed66a1c35a8a2a0bb36d666ac370f21eb3c01d2. 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/PLF242007072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02a2ebb9153472fc445ca40d6ed66a1c35a8a2a0bb36d666ac370f21eb3c01d2. 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/PLF242007072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x823376ace1f824917c397927186e864338aaf50e8db530ce3eed19daa966160c. 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/PLF241705690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99d1c373031fa3f0eabad0c7dc16e54591fd05d303e54dd80f55986a565f936a. 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/PL37A1800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1446ad146ffc7c00ae67bf196764b922bbfb5f39bfe5a9f35a69b99f4281a916. 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/PLZ281900027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bfd5cab9e6169073d4978cfdd50e819f17f55c4ec52dd93a77cc82ce65c32d3. 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/PL37A1800008.
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 0x55123ac867a59fa82a9f586edd5ee8cd49dab277de161b35f26c0d48181c92b0. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/PLF241602410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6bf686361c1f6555acedfe125ab9f49ff417ed6d108c3279f37802bbdfa5af2. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/PLF242210843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7512c1ac270261cfb2c10a6cc68ce36e181830cb8a773c8c4c56ef26d6cf00c7. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/PLF242108318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4512315f796660f3c72170ce59d8952f4028ed2e0b4a4a038ab47a69254e1588. 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/PLF242007337.