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 0x85f223f2c5c57641c8706cc027ec1a6efc6877de3b4a88a908a4b06a82e1c56d. Chain 2 (Bitcoin): anchored in block 953730 (2026-06-15T02:47:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/942b380b-d46b-436c-8d38-e0abf82cd145.json and https://artists.proofprofile.net/proofs/artist/942b380b-d46b-436c-8d38-e0abf82cd145.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 0xbb15c7ff221a3d95877644f380d4a22436a2713b2bd2c581dfe6213e30e9afef. 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/FIWMA0200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bede6f4ff39774dfb20f2339791eec07000e7a97b46433ac8e94075798f2588. 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/FITAT0000031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c8ce4859fa4765311d61f0bf5fe4280d9d925c0d753f381d8e9fa6047b4f0ee. 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/FIWMA0200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b7375abd298e5e614aa36ffbba00551d7e85feec936e8a640f85f1aa47d77c7. 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/FIWMA0200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0d17395d85f5badd02796d7cc6885a16e02a85990c08995d497b783ae396b74. 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/FIWMA0200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d2c3e6f8f45bb80c1785d8e64e01975b62438196693c63999a06f84d4abcdab. 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/FIWMA0200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9bd8a9e0f6efadd86daa566412c4dd37ef2637ef837a6e7eda7694e44591e34. 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/FIWMA0200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0c892a2ed80c7f935e651621be7c3294ff7ed2064899f7b69adee0a2f741403. 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/FIWMA0200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d30337ac278908f3f35f356ce6d0d84d85ae0d4e6c6bac384e4ab54b83860bb. 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/FIWMA0200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39a21fcbaba200e2b2915272243d4f83cba8c2e1748a81dc92764c42316a130a. 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/FIWMA0200012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7943ea2bb00cf7daa6f45af5797edc9d53455d29fce5e1dd1235b1acdeff1829. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/FIWMA0100094.
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 0x3c4c5e16e36c4c595509c55551fe1776167d2840edbe3f466bad22adb66b47bf. 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/FIWMA0200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2de08f50b69414afc7643f774e5ae9226aa40a9ed8c4b5047953992575f15178. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/FIWMA0200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8e97ae1cd906a99e60e13897f2c87cd4981804d4f9f915db3c158db39998c13. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/FIWMA0200016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x164559887c23fb2b264748b5308ac6b92b1e386c0596c74032f7a9bd4633299e. 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/FIWMA0300326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2382c3da9be26a37915dfbb518f2ddad4d0ba8408f2b27b7e9254d45839837be. 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/FIWMA0300424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x086b2f1d78046dc86897e5ee6bff57aa05ad91a846716808f05a1f08e1cb43da. 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/FIWMA0300425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd50756fbe5a9aedd58615afc4e963dec912de7c190b10a311de7c6000e8b0b34. 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/FIWMA0300427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd236264fcb04b08959f0db537819e055a381fc42bf7c68e3edd5d442992fbf5. 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/FIWMA0300432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4952edd9dabd7e07589d5b6ecec013ab033fd1e534ea220ec78683462175d226. 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/FIWMA0300434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbab6ef7372dc2cea927ba991fdbf742b84c8b7550647b71497458203fedece31. 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/FIWMA0300435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f1412145c5c8239886bb45f546aa1a873e5de574209f4472fcb5adc37f52081. 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/FITWP0200174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x617aeac428dda39b5f5dac08cdbc9fd6118fbb5f1beec341b2a123b9e547376a. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/FITWP0700045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc85091bde7e8670e7647fe217b4c52bdbe24d72a2547f8dd979c9c0596a0b5e. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/FITWP0400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fa614e0ef4aa95ebbebbfccfff518b408cd3d6835c2e650de869b0116ce2b50. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/FITWP0500101.