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 0x4f324478582f016d2ff60e02ee4b8cfe30d870edcdd48031ce4e78364ac4d44f. 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/62210430-b2ab-46c5-a0b0-040ceefe1cb5.json and https://artists.proofprofile.net/proofs/artist/62210430-b2ab-46c5-a0b0-040ceefe1cb5.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe76bb74c6a4fdd35d6101527bd66b544089898af6cb931aed26da246fbb10493. 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/BXEI91500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x691340cfec0c1bd958173c8bfe1949aa0b63fa0e803d6d0ce6d35d4454014566. 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/BXEI91500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaca2781b01a82e11e8f8ee0b7578405fa4fb8ccd67c7993e3cab4fee4b27415c. 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/BXEI91500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9ffc3665efb1c0fe821660ab33381498d73422b13fb185d25309b55f15fd638. 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/BXEI91500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92879803a6950dae236a443abf2a4fcc305149c58596ef71649dfb03ebe3fc2b. 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/BXEI91500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac4bd3e8329cd8b0db8a6b32d1e331a953b8df2452f4092256ba33da08429a55. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BXEI91500013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cf8352d24b8b802188ab713e669b47950383f2001a42cdd06f6cddc8439743d. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/BXEI91500002.
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 0xf4bed125728c50a18102ddd2f1c59e4cdccc735bc100372ecd4910ac69ce48d6. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/BXEI91500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c16857e97850f7fd06311ba3a5c4dcfd6d13ce0813a5b3f98a348610014e3ad. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), 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/BXEI91500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81b74b1c3e215cda6c1bfc9e635fc345c1c751fa8dab74c0a9fb0448c3a9be4e. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/BXEI91500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc834376f647e5a0f7c9284c24a61766040a48316a156a3de7114bbcb02f62018. Chain 2 (Bitcoin): anchored in block 960352 (2026-07-31T05:48:30Z), 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/BXEI91500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2ddeba78a607b924b1b6522ab116001dd94d8ea4ca837b60be1e1afbcfab740. Chain 2 (Bitcoin): anchored in block 960383 (2026-07-31T09:50:37Z), 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/BXEI91500011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x565aa3a39277591dbc924bcf56d7196186db37e0e385af7f2dbcd79cbe5bd264. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/BXEI91500012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3e77e606e815397ff2c0c9f590579b514f9f8c4112982ce30dd80c8bbe2f613. 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/BKAM22200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9393cb6e752648342ca74aedc62e0d4e9ceb67e1b5a9a03f0c5ae5cc5da5ff77. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/BKAM22200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa22fbaebee6825e5230eff216f6aabe7803ffdee8feeda9ce726ccb5ae739f41. 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/BXDFR1800043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11e3acc7ead64494eaddc96c32e83161cfb7a46ac5cd78b2aa20e8e54fed44c4. 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/BXTS22000142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4bda30b62e9259ca9ac20e47b8beb22b1be7b66651da1f540ef9dbc51585d35. 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/BXTS22000148.