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 0x18a53fb9f5d7e0648fe1f34f8d6f6bb1c764643929a7fe7884e6b5260d5059b5. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9125e413-8f86-44a0-8357-631b0ee93bec.json and https://artists.proofprofile.net/proofs/artist/9125e413-8f86-44a0-8357-631b0ee93bec.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 0x46adf172c485930de98060eff1fd112b9abe6e7cdfe359a83d3623f08d8dde84. 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/SE6I32438348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf794c0392458ba5d2f560aebd9bcf8f099d3f62c6b608cb22ca6c259446d2011. 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/SE6I32438356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cefd4138f96fe26b2ff70b3d54a7bf440056a15aa14d251fb4c5c085e4d0c0b. 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/SE6I32438360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe377e1d5d90b6954cda23f15d43095eb30384dfbd5bdf117779fdee7badd5c7e. 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/DEYX82205148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07c93639390911275e0a6a223cc9df4827f561ab3bf8f7f93ac499d6b1d166d6. 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/GX8LE2425971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6ccbc523fd436686d7c2326810d60feeec3a5066f8f1b8c46ee3a2c8d522b90. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/GX8LE2446518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45e1e7ce28636f2c8d16c9fca3eafeada71aa6ac6cd80079b5a7fa89dadbfae3. 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/GX8LE2489861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x176ee0c6bd6966740d0a77213d5120a6bb116423a190e0503e2579604f1adb9f. 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/GX8LE2430260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fec0d08da75122ad3e3356c3e9c6989377767b4ee6b0d06b9b51fd691a7bd6c. 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/GX8LE2445021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0293e221ede9a748e93a53aa02752b2886bff41a9571a480533aebb180d3a81a. 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/GX8LE2413949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47dfa710e49fa32f39248be805bf77319bb5e538023dc8d3791bcf560360933e. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/GX8LE2494189.
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 0xd560b4c85a231648864ed6b82e67ba9d19096c2fdf4a2b288699c8740ced1e93. 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/GX8LE2497355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb2007f5645502a52de88812db744028d170b5afaa25542fa40d500e40de8813. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/GX8LE2405500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7277c499ddded20f2416a67b746a65f3136855cb80628ec4335be373bae4c3f1. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/GX8LE2488737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc42c041fe99e51cc0aca7c2b5b184f075b508fd250fedf34b3248cddd05f71db. 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/GX8LE2447082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62930094f7fb1308f0fb8e051352083baa35d8f38b2b19b137ed5f4af6d52cf0. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/GX8LE2462106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3db7b70c472f3ab1633c8e5663c11e8bc20abd3964294b237707f1445b9bab1d. 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/NL9KQ2442103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x425ee763a4b066bca88b16c72c4c0b3e30db721fe32b3a2e147e0fe4e42d5af0. 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/NL9KQ2442104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52c3ea74aa890b506476cdba1b28b6dcda974cb550db12912ddc066258e1ba82. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/NL9KQ2442105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b3cc014f5019364ab983034454311fdae16c6fe431c0ec9ac3d9e38378d8201. 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/NL9KQ2442106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1446b94c4cf4a907cedaf66206a9ad994e362301115472efd2a33616a46a0ccd. 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/NL9KQ2442107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7570e65381f8f9607b106c59b80d1a6aff51ccc3a0d3f9d154e10827405b048. 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/NL9KQ2442111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x512192b5fa8507f52e1e529020258218b8149693a487f517e9e81bfbaf90a9d8. 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/NL9KQ2442113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee5ae1e5b87288a1bb7b55f5e08571f70ed1d4fc730225cd02de513535ddffa3. 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/NL9KQ2442114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc66d84ba635441ddbef9dcc1faffb49fa2773da46d4c93f2b402c882e71abce8. 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/NL9KQ2442116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25fe1596181e03afe89de2ca5d4d07b65ca63183dc051c6c85f3a9294c748b84. 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/NL9KQ2442108.