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 0x5756f886eb5877fb888b4ff73fb7e21977efc4c3283103e5845a6751defa50e9. 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/40cd94b3-ded0-4108-8f1e-4f0eda16f92d.json and https://artists.proofprofile.net/proofs/artist/40cd94b3-ded0-4108-8f1e-4f0eda16f92d.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 0xbdbc96495ce6d9818f8e52b2fa499eca0f6f686453e9856e82eca00cd86180dc. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/MXD941802697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdec63094f21104f366af24ee7ffcb08346b638f068b3332ef56a6b9a8b4b208d. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:45:31Z), 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/MXD941802698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeab4cf2fd93aef5cbd205e6a3e1230a6881217a73a5a43b4072516360d8d6ac1. 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/MXD941802700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3d6c7f7aa17bd7494501905bdc90d8f0bac8243ed3ae4d773ad4fab95007c56. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/MXD941802705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadf5d52b387957c6d067c5bbcdb89c2740de9b0c2e063c0402e1323b4b9ff624. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:01:00Z), 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/MXD941802707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacc624bb6b56072a0ef7911cc40269827da0766ac87cbb5b5570d507be9ee096. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/USZUP0910392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23680439c55edc755c7e8e550abd7b70efda8f69aced6089b2e4422904b53686. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/USZUP0910393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6450bda37b4092075ad3baa34ac0926a622b0498f8ed693d82a2695a9e32cae1. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/USZUP0910394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bf4ca1d45c2c9e625ff2844c55674ea7891c9e3aae32f74c4ad0a847cbc29c1. 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/USZUP0910396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1d20dbb357003e558f40454d04d8a5d620d04ee8562a7f2393f3179d79d28e9. 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/USZUP0910397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0c4cd0fd06f884156af4ee4be0cee98709297da8030774212eeca5897fbb93e. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T22:07:56Z), 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/USZBG1112107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe6e11ccef9a7a503c93c6b5863239c31df3d0e9918ac594285a6133e3eeb883. 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/USZBG1112112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4e55269ee568cdc5b5c728d5dd6fb46e4f5a0e1d0b7b31db6787e9582e77cfc. 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/US4XG0408470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb457dcbeae5a732022da42a8ead162b36ddb1774d16f2713956f2bffed443d9. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/US4XG0408472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1e2e0644e3940c36653790568e12bbb449e6a132c95798e32dcfbd74a6a674e. 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/US4XG0408474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbce56eaa52e589576b32b2066d34098ecf134cb5147bbf091bf7a91af8609c75. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/US4XG0408475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35d292d7bf1a5fffe85f4f0675ad97fa420183b972536814eb80881e863376f0. Chain 2 (Bitcoin): anchored in block 957564 (2026-07-11T12:19:47Z), 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/CA5KR2200814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e718a7dd7583c7c577463c6e58088168eeb6b8ab2011e884e89c366696e0f05. 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/CA5KR2200815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf30f2d5911efd395f253fa24d7d4f4b6e29f54b43f833fe69962639bdbdd3db. 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/CA5KR2200819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x301fc83500b79e4575fcd7e032f719f017a7d51f5d61452cb6c309f4c765b2bd. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/DGA0R2485226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc1ca1dcf101a218db09011879e88b9014e7e6d83a57eca0252cc1a746a2df85. 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/US4XG0408539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa86a368a30899371bb16671119aa11d9c948479fc0bd591678c26e8950ab202f. 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/US4XG0408545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32d7593ad87ba72b4df0b4e6cc4962ef95b603e786f74182371cbd506e7c72df. 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/US4XG0408549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1a2bd4c488a3acf4dbfd66d917dd94d0d03b9864f50c6fa484f04b4287b80fd. 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/US4XG0408553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb201e2eee78b12fb706029066acb4e9a068a7f49f2caf6df3bd5dc6375310faf. 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/US4XG0408547.
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