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 0x3e77f65b0ee9da31e07015af9719fe46613226fc3b2afa3c52c5e72759684aab. 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/9b34fe05-6710-47ac-9929-ab78ba369b05.json and https://artists.proofprofile.net/proofs/artist/9b34fe05-6710-47ac-9929-ab78ba369b05.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 0xa14d7d6fba44ff802cae886bd19fd10d4e4aaee0864f00cbafa102e6f61f99af. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T04:40:44Z), 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/TWCC32105988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00930c4e2fd036ada101f7c6e8bdc726886df673cde50a0589e89c2f5abcd57b. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:59:10Z), 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/TWCC32106684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc84269219ce2f5d35c43c9f3779c2bbaab62fad3ea8d40505908f006146d8679. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:48:37Z), 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/TWCC32106116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x439af72a9b1580c11d9ad9ce4d9f23e5c03240f0f91afc51c37f5a14bc50a324. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/TWCC32106686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88f07e4dd6fc2edc6a2a2bf9883ca4dbbe532fca3e956a3f5a7b7c7eaa95dd6e. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/TWCC32106690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf17adc8baaa4db019c0708c4969a62245017284ca36b00224d538cdfca4f4493. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/TWCC32106692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe42de54cc6ffb18960db4e8c6d34f5d6e535d3c4816a406e5b90f8e6c7a3101e. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:02:56Z), 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/TWCC32106709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c1a5170266b52f1f47dfdde2e4355016a65a2075199566622730e4404700595. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/TWCC32106865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aad4aad84b15baafefad156062cf364d9dac4620c378aef2282944f483ed386. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TWCC32106749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41a1a0a0176dbe751cf01a3c8d882420662e8cc99142ce4db5c2216d2f03f8fe. Chain 2 (Bitcoin): anchored in block 956713 (2026-07-04T23:03:25Z), 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/TWCC32106747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dda4299ba4ad02fb1cae433a15654493e75873330ca1233636cba569c41f294. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/TWCC32106763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd76fccdfce585a1d09909c7f31587402d71381f3743bc9fb1a95b3917b2c1e78. 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/TWCC32106765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x835858979cdd871f821d7d978244f941fc7a67581464f2da07e978c056846b3b. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:17:32Z), 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/TWCC32107836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x168199ea2363797e804e5dac04aa803fcdd4282c3a5639860845cbb5a975b481. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TWCC32107837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9f15abbea24e41bf79695197277bc5337443f7ef67c3a1a8d8d0836eae2cdd1. 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/TWCC32107840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5cf139b01fd4c83893eb4815c618dc44c04728df295b0773460d4c1e69cfd30. Chain 2 (Bitcoin): anchored in block 957761 (2026-07-12T21:55:15Z), 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/TWCC32304852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd35b74fa68db35723b11daeaebe0301ffc95a87d0bd881f21f0b79504fbfb940. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/TWCC32322115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bdf3a9725808c8b68780d82eacde95bee1b21c51b6d46be8e6aca1e4d7f3a88. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/TWCC32322125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbd1aaf914781984802202a8eee515f62c7fc212a9e2fabeefab0183a8027c6f. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/TWCC32401930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe86eeb64efc6d278088bbad3f5b540e80c1d1138b05c7ce95fe0f84f9e79fe30. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TWCC32421693.