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 0xe00925dddf321ca8aa7c0d9f6d0130c4450179be3f3438a918bd9969bc5b3744. 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/abacf839-9e13-468b-ba82-b2dd837e4089.json and https://artists.proofprofile.net/proofs/artist/abacf839-9e13-468b-ba82-b2dd837e4089.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 0xcde1f6d1627d96c96349b15acf128289f087538cefd31a7878669db7a53b8b63. Chain 2 (Bitcoin): anchored in block 957876 (2026-07-13T16:00:32Z), 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/DEQ022009081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd62d8d3eea7f07fc57595288de5cea32b26416ecc4a00bf923721d98e9348b7. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/DEQ022009082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7285a10becf984c98d034e6ab7fcfa8875e4d2fb72f21fd4cef5fc9b01cce670. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/US3DF2170172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x107bb245168ddcafa530cdedeeabc36255223515dedd2dd2a1c863638bcc9a35. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/GX5MX2262385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4269bc3f8fba6ba921763ecf0c014f841130b5a8b43ba299d0aa33647fa3feec. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/GBSMU0118472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6667bb41824efd7b8d96680519e7d7e23589af2e8e7d351f85b87ab280662d7. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GBSMU0118460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c21433438318e4f9f3f8435bf1701463a1b9fe8204df7f77c669304ab108584. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/USANG2268649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0157e9992a6a4f6579e290142dd3d5cf7498563137432ada4ec82cfbad49309. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/USANG2271089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x067bb0534b494038630a4429da4a3ee57f73d92bfb73d4b56dce44238a42f608. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/USANG2271090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0677583fac0da7edb4c577867de8c859c4e4491abd7e9b386ce669d87ab45429. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USANG2271092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ed0f3cbc30f27613bdad854f09aff638af2c4a63f393f6810c83837f16d9161. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/USANG2271093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x493282f0748439cf4ab87a0a7e54e76487848552eb2c2a3cc44ebdb2acf8dc99. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USANG2271095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x542adbf6a2f0d455be623b41d364ea410fda1e5bd836c0c5e2adf524bfa45165. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USANG2271097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e94644acdb9d310f6273520b4aa202a89a58774aafc8bf828e6c1cca67c84bf. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/US3DF2500510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29122c36743b3a8825db6a1151eccac86dd7961913a6e5eb9b10dc1daa478dba. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/US3DF2508449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecc5347c98b09a7c463c239d68064a94024a10546b5e83c9f0022cc1bc48b25b. 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/US3DF2508450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e94644acdb9d310f6273520b4aa202a89a58774aafc8bf828e6c1cca67c84bf. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/US3DF2500510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4d4d8621dc7230c41178fff5e0004d50e7119e956780699e0a2ca7d24b1848c. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/US3DF2504268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x533c338f985544cc85b4a0413eb94ebce1809b14a8a967053d4648803679cc1b. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/US3DF2508456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd62bada8aab61bbc1f63616ee790385c3718e37736e2a35bcf259ac759b76977. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/US3DF2508457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4a14d234c400f1cb191670940922c1196417231b9b554cd414f80c6e01fc521. 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/US3DF2520606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4d38069389f2d97555cabe30ec910e065a9b612c1bbb4dfb99077666e7d0313. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/US3DF2520608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4d38069389f2d97555cabe30ec910e065a9b612c1bbb4dfb99077666e7d0313. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/US3DF2520608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb52da5452ab11908055bf789670a39c2e73fc8c6d984dbb44e38e255529bf9b9. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/US3DF2522268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6bf3cd45c1b03f93c1dd481b87875225f30db65a67d9d6f30d11dc2f9ddc684. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/US3DF2522269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4196152327e232a033ea150158429f989dcf54db829e191317b902e2d6f29bba. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/US3DF2522270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4a14d234c400f1cb191670940922c1196417231b9b554cd414f80c6e01fc521. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/US3DF2520606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x049fba1c51e20626b8a477ddbe92ee08e25b47f5d63bd154a1aa812512d35633. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/US3DF2520709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x472f5e54ab125bbc5537749dfaa5069cae44b1926b24ea002fe8d447577d090b. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/US3DF2447704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd1ba42b2a816ef42e3d25721fe7016b932d0a79b47d848592cd07977a95a652. 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/BCD4N2300157.