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 0xd20dd4ba129addaf8c16715ca7e3376bb1576ebe58d37af74b0a6609b8bf7381. 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/f9575ea5-8797-4c3b-8947-d605c2a806e9.json and https://artists.proofprofile.net/proofs/artist/f9575ea5-8797-4c3b-8947-d605c2a806e9.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 0x8b55dc276a1ab66f809326bc1f654019fc55b5ba6a3bf28787bdd2c4de605d7f. 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/USANG2419594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bfa39c33381378fbb7b1aecdb2abb78fe0bf3e016a7c674ce493d646dd42009. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/USANG2425999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaccf7b667f9abb24f962ad44663a930742d1a8e9e71de4685f960e96ee5797b8. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/USANG2439009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca7f0b63fcd72b0a3519e4e306046d5ecb94193a6b7df53ea10d3efc3005a5ab. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/USANG2439010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f71bb3eb0c875cae8fe7cac7ac251e62a3a2e8d973e22a8ffc5149534bbb940. 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/USANG2439011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa88acfd5da75c1dc96d1f2eebdebd71d076797e391ec348291b66765ab8d3df2. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USANG2450753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75379329da7579b93f02555574a1d8f97d4b4b7e3de296a97e7f782c62361552. 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/USANG2450754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf58064458123d6683dd7ff4363029991f64c8ac7edd99eee2692b19acfca6ed9. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:09:31Z), 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/USANG2472878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67a6d918cc2921334daeb4496d452dc4c40c0204383669a91948e01ce5d3b983. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USANG2472879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f1d80eb08b00cc8bacc157641b645394e4c0eb74469ac5d97e4c965449305cf. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:29:51Z), 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/USANG2472887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf3140180d6a9732bcf3fe4e24674f7c026ac32d7a30754ed6e6df63074f02e4. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:24:20Z), 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/USANG2472888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa34e6fc44b79424d6149a339878413d46cc651f1ec03c6386f703c5a2ce3d68. 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/USANG2496507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x774fcbfda07c585f6ee294bac31cd44930768c62b96626660d170c6386947c7d. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/USANG2496508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9e180c35ceb3d6ddfd83f5abeccb09b118de1f08fdaaaafc87d951c18add8d9. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USANG2496502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd58391670a61583d7dc51fea7d7ec955eff5e97315049e1ba74b6db0676cfca2. 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/USANG2496504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62baab6835dcd864a72a9b948603f6c1930ac0a713914bdef011d3c6cb71045b. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T17:50:03Z), 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/US3DF2508570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5666a572db698a838fd1a10939d26c7bf3761076ec2e2ea2a50ea38120b6caad. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/US3DF2520412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aeccdab44d2eb6939bca791db2564e2eafdd2517fd5eac34b8795b41ad97fde. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/US3DF2520415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0322a03b75df334ba47a722ae6d08a25d468e5f47cbd1f8973c3d4429aa7979. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/US3DF2563481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b3c9d96b4410d9accf65e590629d015abafde4e64dcebe949d8714c36c42ff7. 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/US3DF2563484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x300bdca930ee3f3ffbc6d4ad7cf343030e679368f8858a0aed17203dade39ec5. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/US3DF2563485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1842ae8622a56823931e205139073ae77ab20f492cd54e22f829f20d1446a862. 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/USANG2526567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa238957659b45c7b339d9d3aba7841858bd7d47758f2db9ad1edfdff64b71251. 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/USANG2526569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x651b2e7913ff9026773eb97fd7afd284f60bd0eb8f1cb3ca6cf7db08c73b17d8. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/USANG2526575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x984a4004d7ceafc09b309512a44d73931d88696b30776104ef8d7db8361bcdc0. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:44:59Z), 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/USANG2526572.