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 0x403871a592a884de8c106238b4ebc3cdf390852264bc3f0f250efd068bbb1224. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/99b38f7f-24b0-478a-ae62-9046680e0397.json and https://artists.proofprofile.net/proofs/artist/99b38f7f-24b0-478a-ae62-9046680e0397.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 0xf7e37270d323940231a08082e58f3f362bc81ef6aaca003bcc06f6dbaf19c2d7. 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/TCABS1490030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7650482b89e59dcd858368724ea209a659c0ac38da658f09b6f0a772c281cfef. 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/TCABS1490031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c5db0a9efbbf7a23b4681ae12b4b7048a3b7f542ff6bb59324fd26861211b09. 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/TCABS1490046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcc721940bdfe447e584d380ea4af86000bb344554a65afc1be4d097fd467907. 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/TCABS1490048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc23a742c824b6e8af2ecd89135f859200f2088309b27f4caad032ffc9f5d9bd3. 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/TCABS1490052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb8ee4fde9d8de10acced76a422679ce4e3539d898519be5aaf53265a56f8c94. 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/TCABS1490053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69aef69ceb5604edf06d6f8bf0630e80abc21de07f5d1763f568097bd3ccfc4b. 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/TCABS1490081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcad52a44a9cf6a27a2f98c038ea77af2ea3e533fbce7f45f632a0d5dd11fc3f1. 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/TCABS1490083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec3eb6c42d8d50f122e9b5d8b14ebf4c9b8a03cc927d17db58fe78250a0bd03f. 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/TCABS1490085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28547432df8d45cb1a43e023a4321e2ba55babeec5ac20216fab096817930b1e. 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/TCABS1490087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6511c72b59f86ecabc0d77886f364ce1c3ef6493ba288ebd00e4c21e413e3cb9. 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/USWFE2491261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd04c251572da67ce258fa5c76ac347ad9330520fd67fd779a68a407e6e218b55. 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/USWFE2491262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55f8ebfff2b7a5dd411e2e702a68202e3ff59224e63f5697fe4949e0ac43e9c4. 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/USWFE2491263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8b455556beebace014d6cd1dc1c54ca095c7fda761d04a2f99694367d5aa23d. 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/USWFE2491264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b0fef8912c424c67f3094042583427e31ffb8f18058a3b769b99c7d2c09087b. 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/USWFE2491265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d3abe3e8bda4b112710f049ca053d8df2d0713184012d65fd92b3ce78e87ec4. 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/USWFE2491266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbed064199cfe693a603c2be4538240f7e59fd55013de3d05e9c55fb662e92b40. 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/USWFE2491267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1b724d94a6484ea13ec23ddd66a526173ad39562f5e1ed118b63eda592943f5. 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/USWFE2491268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11f29da92f738918a151033d227b367177675411c444cc01cd19a0626eb918f0. 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/USWFE2491269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d44fbdcc595abe0120222600d3ea4a1987c5a8087ab0a95bf3595c50ae4a252. 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/USWFE2491270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87d325bfed727b8983f5b3e93d23da521d9d0ea8b4bc46a6075a97d22ddeedce. 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/USWFE2491271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa22c20d6b6d081096f806f9bedd048a74c6e7042e7fa692ccc83a938ddd29738. 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/USWFE1990596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf042c1891fcab74b5da0115c86b8836e97e086cf3c297c4076c199414cec79cb. 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/USWFE1990597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cd7b5591bbd31b84d1409f35e426103a8fcf742c59b34985e33aa7b9b887106. 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/USWFE1990598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8095e52d2f0cf6af4e80ab04ccf40765388180470f40be284ca581635caaa8e3. 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/USWFE1990599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7a870860c8d2256706bd856a52a6f97341f472d461d5ebf4a18b35bfd757796. 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/USWFE1990600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa225898f1c1be6224a3fed1ac1558ec6ca2970496a21e4d4ade422ada44290a0. 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/USWFE1990601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac21c1da080a5e7886efd49307b174451ecefadd27252d57e93d9d9563f48ee9. 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/USWFE1990602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd54ca71ec26f1c2c35836bb66bf9a726e22e2fddb9a5750c69522e1d5ef68faf. 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/USWFE1990603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9db30dab2908ca5f358e9fd1e53fcedda613bab0959dda3816ce5f26f586be69. 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/USWFE1890526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07acc38c7e10dea97fedf7613835c113f247d1d3f24789350d5b0e047970af68. 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/USWFE1990604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01b8944a620e2cf2326e0576fe0f0deb2640f0a37bfa935151b15523dbd9c01a. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/TCACH1504759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6df9d69bc6bd7d767f8a445a3ae48453a2a8d3e68b22a941d24b49b1af69bd85. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCACH1504760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdac0f454c31a8e23c5face252f056d0f82f9078e4782f0e270dc8b789a73761. 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/TCACH1504762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf857cf10f4b4e9bd73c6acac184686d87a6db9a267f3e09a46297fd2195e3682. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/TCACH1504763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0a39b7b65ca5a64e862ea5aa63189458fcc7dd5110d16f0d6d8d41c48aab6c9. 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/TCACH1504765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2655366d67fafdb772e86d1345352d2414eaa097f7cffdf2648ce0b7d34a300. 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/TCACH1504766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f17bfff1dae4639442ac75518e7d5ada5a600a4095654698f7fb9adc52a94f6. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/TCACH1504767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb36af779c05ac3683cbe4417c3080ababf9e65cec7e7ee62c4cd865cfcf3cef. 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/TCACH1504768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaad203dde51dd743c87a9c04396c64fe6d8e7ad8088933638a97a63ac40b7a15. 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/TCACH1504769.