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 0x0ee7c32dda17c78dfe74bd92609713b6f0c9e442048d87cc2006ef9273f2690b. 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/da9b6cdd-3294-4ba5-829d-f47821869442.json and https://artists.proofprofile.net/proofs/artist/da9b6cdd-3294-4ba5-829d-f47821869442.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 0xd255342d53353b2c04bfae432a61c65df22bd80d9a7f7f121bb72903b8e600a4. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/DEHZ31700929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee9960d5da4d70d01c300fe979a5057ccbb348f45a86e7139b5a78dd50abe980. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/DEZ651709076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe648ad3f66567d6c6c0f2838800f61669203fb357c8ad9d4ada58ce34bc8af93. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/DEZ651709077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8e3f5d3bf3c2931eb094aaea679a4247457afc7ae9dc965b39257b754baaab3. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/DEZ651709081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75cb2cb8bad2b178cccf51b3327539d1ce827dd6aca4d07ae4318f9dc319ac4b. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/DEPI82100058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x503e2a0d3c4b2694e3cd4b99dd0a0e6aeb75147bbfb33d0bb74b96f40d9c7cbd. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/DEPI82100056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf576320e6974bc6e88741b09f31bfb35f47a0191442d9ff46bb3a0faca2b6dc. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/DEPI82100059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x927b431d4d6ec5524db55c2d98952aa423770ab7948e665ea959847f531d107f. 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/DEPI82100061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a76136f47d3edef89fae7e033f65d5ac68fa177ab0f8acdb26448d191e25aff. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DEPI82100063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d4d799bb64e04d9cb49e5a82179cd4145179396343d618899b485e3e1fc64b2. 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/DEPI82301819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa4349a93dbc5fe8192a41eb8606d275046c2aee850c0b61a09b4e08a5963b3e. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/DEPI82443008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa4349a93dbc5fe8192a41eb8606d275046c2aee850c0b61a09b4e08a5963b3e. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/DEPI82443008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc12b25237bcdc7ea743b2715b67e5195fe7c7c7de8a8bfce171d6cb5f8eb2d65. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/DEPI82451060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b539ee5b21a04f3fea67939e4b4d5b75dafe8532114782df6f5f7922e5b903e. Chain 2 (Bitcoin): anchored in block 959011 (2026-07-21T13:26:15Z), 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/DEPI82502572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0816f931034495c829a49d5e592e2d4ca08522c4911dd94df72a5f137a3c91d0. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/DEPI82502574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe70f16b299f5c1fe330275028cdadd393e4d981bdb80f4c1e7d4aa7767cce7c5. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/DEPI82500406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f0c6e80ca640f59c162456e9537a7c566e2f6dd6939c6d5498bc49f75ce61f4. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/DEPI82502585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2de4e73c194581d5bc3f6ab9d716e0e8fb9cce5b5f5e9e87d1c3cc6307718b69. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/DEPI82502591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x504749fd51f7caa9a6104f5eb877fa8965bb80af084c850647c5617cb0626df4. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/DEPI82502592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9c9801cfb0b13ac554930afe431d9a3869f0a08642c5136aa549ad539d1326b. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/DEPI82502594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5c52a7e6c707b3b29f9ee9491a7f0539d3abcbc1b6cfcb6d3f59a2dd1fb9359. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/DEPI82502595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73b9874b10f9c8f3fd5c1ab21ea1a327d429e345ed16231952529a89fa3b2fc5. 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/DELJ81875316.