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 0xf09699b0799e6ea8b56a17600455296eecc60d5e51a15558379da36a3fb924af. 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/4b5b6f55-ae5c-451f-bbca-47f3a7bc6ce2.json and https://artists.proofprofile.net/proofs/artist/4b5b6f55-ae5c-451f-bbca-47f3a7bc6ce2.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 0x537ea423539b6f44c3ba7bbb0da8ca0e82695c4af0af736163b8f40dfd4efd52. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ITUA12200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa5c86ccdb5e47875e1b0f3569c17a14c2bab0f44a6c3873f8ff49c6674923b6. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ITUA12200012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89460668ac2760fa265939fb8d6ad362592ddafa9f8888fa933f6a2fd1228590. 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/ITUA12200013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7ace1c189ed0a7070d3124b07fa9985235bd0afc7350053bf6efc469a79a2bf. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ITUA12200015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x140e472a01c038ab3577d07c588ce509416f82d9455c85d797ad0c2399f19de0. 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/ITUA12200016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe99ffdf722184b5d1c7c62de8e420b2e42f20bcf9b74ed293e0041b17eb62a83. 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/ITUA12200017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd7e039efc87f80d8dbbc03f9fa60d86f658061f2021f4ec565937f13af01c8f. 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/ITUA12200018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d44456eecb3bf3298569510ee7117ed4dd1d07ab93ae4385f7f8968f33a3441. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/IT9VB2566661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc628e630654387f5335bf59f3c54b2039a7f3e08ee9ff31e9594cf12264388a7. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ITB002401335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fc46c39d9d19f5abd71db8a08e03637fad78e026e86f5e5a0ea32d99f9612af. 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/US38Y2305109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2d1b01bad3a04ed7faf740967508d222ab44674745e179e194d9583ddc12e48. 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/ITUA12200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf95bb21120558cb8c2a551b68b2f627fe8bd6f7caf563be3cbf554c8866d3eed. 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/ITUA12200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4621807187ba36e5852fa622e6642bd81882f7616cd80c035d84dc7fc5d222d. 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/TCAGA2226571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8feb81b343b719a17994feff60e3264736ad902de087a9a0b3d54798bc68598d. 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/TCAFX2115263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7a169feedf8e1bfaa86dc4f360bd9151966809634756d210f6e90e5c0dfcf7d. 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/TCAFT2141465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x835345f0aa45a7249b01582e0974d241d187ad4465df0f962e6fd45dc9eb8002. 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/TCAFQ2162528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec0be3e32de5059c16db7832d90fb342865f4bf5ec04279649c2b3231d289c05. 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/TCAFK2136415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd62437a3fc857d4c1366d08862f17c983c059e62b9a0904874a8ef05b6fc2271. 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/ITZRF2400075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbac2d1be0c67ab4207b093a0039874c82195091fb8e0265362758933249d7429. 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/ITZRF2400066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f4e068e28ffc5b53c63d6c1c4001ac38b4d68745c5eab4aeca2f2ec645332b3. 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/ITZRF2400077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b4f0e5048738950f70e2b5327e9d95db622008709864fb26f6ec0f0f4bf93c2. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ITZRF2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa564a57996a7bb30aff9d9f54f0cb4266c7649d0a9006d43f959b8410404948b. 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/ITZRF2400076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b31ccf8c98107666865faa4c2c8fd42a618947eeae03ace4def4871fe6d0c30. 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/ITZRF2400078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7239b7e93d75c06af0f32c86ae199e2ad3ccbe59782567dc1c85051dd3d1bf96. 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/ITZRF2400048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x690a768d3e3b14e8b33d04621d5550b053f3e71ff8a80de3f9762befa4357250. 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/US38Y2313103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b7d04f6f5519ebfde84fb8255d9589d293b8358405ad3b501d9f90602c63fe7. 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/US38Y2313104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d614821eb852375da7526b5359e8b197c382640388be914c391c9e476f588f5. 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/US38Y2313105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2a5282b2058e357dd98a8466be0dd21b27ef717ca6514829093ee07138d5e2a. 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/US38Y2313106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16432edcee95c8115a1988ed79a55d0061bdbf17532ef8539c629ede19541fe8. 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/US38Y2313107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a32c87f271677c0daaaf6cc2136bc08a39f9c8cbefa35b53a360ac1a162cbc1. 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/US38Y2313108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc099349fc1590afa4512f29d19da1d5c376b52799b003c5f1536b3a34bb3d7d6. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/US38Y2313109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fc46c39d9d19f5abd71db8a08e03637fad78e026e86f5e5a0ea32d99f9612af. 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/US38Y2305109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48ae62a581e2def063ed593ff0f4de90f415d8bd0d0046130ef3cdcb28997b7d. 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/US38Y2313110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa5879f89f6a361a5922928e801ecc97f283aefcc98f19bd89a71371037eedaa. 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/QZFZ32360666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbac2d1be0c67ab4207b093a0039874c82195091fb8e0265362758933249d7429. 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/ITZRF2400066.