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 0xd966d1b3cbe52bc99c44d7ca44bb88c1c3083823681ec4d83dd79a0ecfd02388. 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/fd38928c-ebd6-4f7e-9014-37e224ea68f3.json and https://artists.proofprofile.net/proofs/artist/fd38928c-ebd6-4f7e-9014-37e224ea68f3.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 0x73b5589ae7bd8bb120c52e7006b25781ae7cabff08e4b02c9def15f56ef938ed. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/TCADQ1807212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1074d88b786bafd848914a193bcec4f9da0bc9e115c53481be10832f5355296b. 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/TCADQ1895765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1586465de4af94c6176f0fd473764352d4b9d22af9b80503cef75db19bd6392f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TCADQ1895770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2769b881b56309c79c561a44d7376d6f0da06b02eb5eec62f8acc1c0286f9522. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/TCADQ1895772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x858ce174d4b6ba0769ca81437c734a7af1706c7d5d7cf3172a0d906e983e80b2. 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/TCADQ1895774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66e26286c2a95c336160971898f5f51716655bdb8887434d43896b965093499a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TCADQ1895776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde92254c09ff4911a2361e9cafdaf2c9e9eb180c77323b639bc2ad54699ed9e8. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-21T20:58:12Z), 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/TCADQ1895787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f519fdf9540d331da869417f5bae26499f4d75b8a0afeb4e937817c2e4d6796. 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/TCADQ1895798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7099aac6e430a73a25bb1360f75e26e5e2c6eff4e9c696123b7a16e6fd2c8a7. 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/TCADQ1895803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b7b3fa2812ecb48266283bfe7fbcb6c471e27f3311a6bd1616bd0fa2afdbcf0. 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/TCADQ1895812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x407cda8997f2c8083c0bd55ed84b4d93537e248094133222d57bb402f39a3f08. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TCADQ1895819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f7d59fdf0bb23bd72f2a69bbef512d316693bae6229afff4d5049b62552abff. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/TCADQ1895823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0facf09ff81cf0d738d5e23495ae605b81c71007480203a905b663fbccc12964. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/TCADQ1895810.
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 0x4f6f6c1d349e5fd6f045fbfbb8397654c41a49506749deb810b4f96a00a15387. 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/TCADQ1895815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46bb5722fe76843ab75b1fb82aa3bc32bf5e2698c4d91c8980134cde1afdc6ce. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/SKAV82000201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a0c0a79f1fa24f437117f079c23ddca106aa0dcecf47e7e8f7c67961c4872d5. 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/SKAV82000207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9f5fba62986f8fd5fb95bf26e7975378d74c87e888db8f41050d233679a0a7a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/SKA012000014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x987e45f05453860a26a302c19f2ce42cfc7ebb61415cc5322a61fad8679594f8. Chain 2 (Bitcoin): anchored in block 957039 (2026-07-21T16:16:16Z), 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/SKAV82000204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82a9a798c3e12a9f49ba4a53f1afd866845b2501c6b4e22935ed8456b3c392ea. 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/SKAV82000205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe55a17bf676474485ea4b17c25aeffea7d2e8f144aeea0cfb4a11353cd345163. 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/SKAV82000206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e6f6da86b78b5d94412d6f70b1c89dee2f9cb9f6639bf3fc7254888f00b3180. 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/SKAV82000202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1a481918b65fe34aec45a4d74cbbbd965766a9c6dc00d741151f23712639f0c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/SKAV82000209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d60a6e0bf36345df2175e5419fee1201cd4a2b2e9a570c8d5c65816263547d0. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:24:20Z), 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/SKAV82000210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a9cfb03ca71c24e2af115b7e5b400274ae0588e7461aeecf4732440659d9de1. 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/SKAV82000211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ebe92ad1245c1c93cfdaa3340a09bbbe1d9b203079e7bacb3f2df4ec3401b55. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/SKAV82000212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfd2724ef5651e9b67b9079ab8f981618200194116e3c9c9b405911c9ecfb545. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/SKAV82000208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x211e4a314bfed84ea38c9039e95b15e462e40f9890af2f5c097da73dd67a2bc8. 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/QZWDW2223329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaac41a8d750a1291f73fd45099cc13b8b9dc2b1b381dbcf9bfe088b7106e1f4. 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/USDHM2301197.