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 0x685a08b76c5635bbd967cb9fb5e8a530600d7c98b7b9d26474af2821f7e0f16b. Chain 2 (Bitcoin): anchored in block 953808 (2026-06-15T16:45:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f094db81-b756-4d06-ae02-55601c709ebc.json and https://artists.proofprofile.net/proofs/artist/f094db81-b756-4d06-ae02-55601c709ebc.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 0x3d6ebcb1c4137fb905e356ea05305ef40f63511364d6425285e383abdf6f79f3. 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/TCAEZ2041552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20fad401e9f82763826bd9e944a241c9e5e24e14d52e5bae4c18c15e2d22139c. Chain 2 (Bitcoin): anchored in block 960311 (2026-07-30T20:45:02Z), 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/QZTAZ2399327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78d061a8d285d7a646c8fa8c4f4c5b484f99e2c9065eef22b09ef51e83baac81. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QZTAZ2399328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x674c4f291003ba29a42ea78504bf625743a10495dfa8c065e77abbf6247cbefb. 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/QZTAZ2399329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae7cb6a090cf88f63a7c7aa492a81cfcfc34c321b0ad313ddc2aa3f0eb79958d. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/QZTAZ2399330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4e3ca477b593cf21a2057a9f3bc5b30d690c15347a139ffd48325046abf415b. 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/QZTAZ2399331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46441cfb0bcb80d1d400cf25e8ee931e0c70c076e8bcd1d1d0bb93c470057b60. 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/QZES52336684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x843eac22eba237f0aa8e98189d7cfa6d5619cddb7a19d1d0e15108a6efde9f68. 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/QZTAZ2399332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4adcb0885cc033c6971112152fab336a87a4c4e4c05dc3ddf30e12eae4aa055f. 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/QZTAZ2399333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51efa88e06f06c801f4fbc914e736cb17f459465d282e200d79b82ccf66d2a0b. Chain 2 (Bitcoin): anchored in block 957057 (2026-07-07T15:21:38Z), 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/QZTB32270954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50018c49dc4eb436d59815ca6ca4b6252a5c5024f6e91f59914ba119f4568c36. 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/QZTAZ2399334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd69c2e3ba78f8d133caadc0e87d83630ea256ab455dca08b965ea0cad56cfab3. 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/QZPLS2356185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f9ec15642bc5e2531e22097094de902cdded5acd0db0b21d6df2f7c3ae10b89. 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/QZTAZ2399335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f12daf2cf12f40aa9d38129ebc2a191056b87f1dd989ea6f2f4232986235e14. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QZTAZ2399336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2737207a3861a00b3287f9042791ea293ad1bb571a17342bf7d476e5dbacf3d. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/QZTAZ2399337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd69c2e3ba78f8d133caadc0e87d83630ea256ab455dca08b965ea0cad56cfab3. 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/QZPLS2356185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46441cfb0bcb80d1d400cf25e8ee931e0c70c076e8bcd1d1d0bb93c470057b60. 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/QZES52336684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51efa88e06f06c801f4fbc914e736cb17f459465d282e200d79b82ccf66d2a0b. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/QZTB32270954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc8a1dfa1a5c3fe9f5e8b5971fea9cbd96a0e9e4855a1c52011317dee487f591. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZDA61893874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc246b313adb8c926f378e1a595c44dcee521523dedca0963b23846a8ea4db669. 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/QZDA61893875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1c723517209c49e8739cc7d1403bc5be7942f3b193ddf99b2d9830642121e95. 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/IEDDK2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b5942d139367a50a36a2624580dbdcda7e894e381f03da5d0ca3d914fbfafcf. 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/IEDDK2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2076a989fc8b03f1110f57fd3732c0a905883c0caca25c12426ae68184f7d141. 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/IEDDK2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3fcfe83cb3b132a9c53012cdbf2509f15e856bb9eb66391d2565a5cb3c53dd6. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/IEDDK2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a4427ae69d49d73e1a1808b6286cfb3730c0ab39a4eec245e54a40c9600b835. 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/IEDDK2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88a9f42138b7f7d25b76bf26fab928b8bdcfcf853865fe6a449438372d7d1c9a. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/IEDDK2300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ff6e042225eea4db038dd91d2be8e22a146d77af42c891f06997b7f87b9f4fe. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/IEDDK2300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86992933f2042da969a6b630f6ce5ccdbf04d38846d9f2b3417b704a6101b791. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/IEDDK2300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x364f9efeb276838bd939c5491a161ca3703928b10c21e3d24649380f19e8376d. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/IEDDK2300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd932a3f490b05a1b363d082bb39986c514e03be76561d36ca5560f5c046a6db3. 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/IEDDK2000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec8782f87c66cb1a972f046372d253ca5365249a9347a4499a1390290b0b5fcc. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/IEDDK2300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3908367fceae45adf756913f6989f08211569f2bfb596b9e6ba3c0ab6fff3ca1. 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/IEDDK2300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d0cc544b14b2e2f809e4df61dc40bc45d056a39b802cf907e7bc030ee0de378. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/IEDDK2300012.