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 0x4a02ce2bd0f697f71ff3a6dda920e87788685165a061925689655a77f4fa342d. 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/fefd9cca-5a5e-44d9-ba92-91d7dd1446fc.json and https://artists.proofprofile.net/proofs/artist/fefd9cca-5a5e-44d9-ba92-91d7dd1446fc.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
It's Time to Sing! with Singing Hands, Vol. 3
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 0xbccf4ba380b503d08d894ac1c866eac7917794491fd990669dc4935d9d5852b7. 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/UKDAU1500068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a4e3dfc8978499e56aeabd52195853de770b3b28cfb76b325db312e46dd9888. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/UKDAU1500072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x340f9cb11414222b5f73eb637ec36e5f67446e5fb4612024fc2ad7d9db8d96e6. 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/UKDAU1500073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x125b6f88d7dfde38f4dca193eadce9eec0d8aeef1e224993048eef9a024f2959. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T23:01:31Z), 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/UKDAU1500077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb105169b38a37102f7f5c4e1dc6dda2ddea1407af7a44b58dcb08da87721af7e. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/UKDAU1500078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x112c503a1beb5f0c2dab530f82f3cfc4413275836353a8d5fef3656a1bbefedc. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:29:36Z), 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/UKDAU1500080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab1c80852a3dd16128d71a2d6ab766d21c5f64a305f99c87b3e023f5f9eebb82. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/UKDAU1500082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9072c7197d8378882afdeb14431502a53444dbcd994462076aeae46f37e0c2d. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/UKDAU1500087.
It's Time to Sing with Singing Hands, Vol.1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa4e209801d0283f4627429b478282fe78d82d98616be94ef9602e794b478688. 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/UKDAU1500091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdee7e71fcd02f22bc7999d092d43c44f0fdc75a4eab5adfefd42e3e9c949db90. 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/UKDAU1500095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa461a8c3d38c30bf5796cea8c98476372dd2431ec529f8625456b06fabdd01aa. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/UKDAU1500096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77af9301149c740f6d3c5de266de813df7de842ae0f7377faea522183eda3ca5. 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/UKDAU1500097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x472f58970460b6c05a43f30a279ca7b809f68e56747a9991a3c3a14b4697bcb1. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/UKDAU1500098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0931a57dfa4220678a958cffb4baa05950215153000be8e727c6ad4cdb994dfa. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:34:39Z), 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/UKDAU1500099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacb51ce58ad63c129c1aaa5b7fd6b7a92ae740ab315af002b54eb3c75a870ed9. 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/UKDAU1500102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf8719295ca5d8d163460443e1b256c246303ea518b274af7302a15868fe21bc. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/UKDAU1500103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa46363175da7e8ca0c8c9a91c8a61189358cd3c2a3aef946c2f2d9120a97b1e7. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:51:39Z), 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/UKDAU1500104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11ecc9674794b5174533dc233521af5fd2d109751b38dec19d8881bffaa0f5af. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/UKDAU1500105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e78340d56a25536f023598ddb4f6837c19961d68d4e21eb6bf689a2044da162. 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/UKDAU1500110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a77360af6b942e08d7ac63241d0e919db52d7424ae2905bc44fcd9463d3a79d. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/UKDAU1500112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc14731675439c9161d387e2ac0f55b4aca1f92c306eee0e987c313e9c7f2c95. 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/UKDAU1500113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f7c6605e1193ff884f780986da4194f5f652addaabce3eeeb2757c8028ddf9d. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/UKDAU1500116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x711375c968eaaac3dd34d902cbbd7bb1b855595b2a89d271f6d9161c3370bd43. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:42:42Z), 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/UKDAU1500120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a2d5f46a513b1286d862c9a2fb4a720bb2cb01a918a87418a035006be98a3f3. 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/UKDAU1500124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30486ae7be64120e483f9d73589cbe54d384bad12d1a3aa94bab9f1c5931fad4. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/UKDAU1500125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x622e9a3f17762e7996d039885d76c9b38d3a4a045fc45916eecaa6153bcf6a31. 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/UKDAU1500126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x596a0c839f43762de6a9299719c8e1dacf04580b71bad31f1f88a3308570e2c5. 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/UKDAU1500128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0248f8b9d371c022eba131e9aa12f2aeeab07b51fd1d530c56ae00d9df648f66. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/UKDAU1500130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5e3cb2eeeef065bbb33ceb5edf71f096c0b798494de55e65fa5734faf01b54d. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:21:05Z), 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/UKDAU1500135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x278613b4c71808e4ea2dcd9eec36abfe7ed0633317688289e74ff4793f6a7778. 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/UKDAU1500136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafb3985c52797f4f2b4644f208e5b9c5f7b9dd36caaf57c2b75cdd70fc2607c7. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/UKDAU1500137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabaad885f693e43862efc6f727539838bfa93ff2bcd0aad176429f5e72407ae8. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/UKDAU1500139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb39f106ff67cb614db0fbe2aeb131127f2dc0c17979d9b9df4c662cfc8724d0d. 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/UKDAU1500141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6684db108995e7c5877447212376ac6640fd82cb878f8651f516efed2ff7d5ac. 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/UKDAU1500147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x189f3a93ef26536836cc50e8ea837c10ddc4149ebba9214ee4734620afd67450. 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/UKDAU1500166.