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 0x62dddf700e04133be7589f7e432462838c9b0bfe99e08e84dfe7d8ea87329095. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e345cb53-8206-4257-939a-f6d63c4b7949.json and https://artists.proofprofile.net/proofs/artist/e345cb53-8206-4257-939a-f6d63c4b7949.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 0x0afe596e8e41b1330cb4d7eca6aa46df7f4d1af2003e51fd5c1c931c11e7c37f. 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/TCAIQ2493906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23e4871a254ebc54d318d3a3b911ae008d106946e9870913268c3bcd43c112ae. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/TCAIP2494432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeac10a2b482772b2b6e5529a2cd846edb25c29106b25d9dfc34f5c57d69db5e9. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:51:56Z), 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/TCAIQ2494048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a3da73c75e771a83e0a33e6631ae7a4fc9674fd42793044e8276e886d317cea. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T12:05:36Z), 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/TCAIP2494547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f5dc622000983111f91195d96b648ba11a1fffbf5de1fa8f52a3635f15a210b. 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/TCAIP2493885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe00114a7047b34fb582d9f738726084077d3376bc602e4f35c09a2da71d30039. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/TCAIP2493951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cde4000cf1c765e5f09971ed4c9d5c72655f290e4da1dfc1015b38bd7a9b3b3. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/TCAIQ2494347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57262ec0b4994bc61df8964eb90d54be1a1850f9bc9d1b539997508beca9ed77. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/TCAIQ2494010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26612b9e288a856dbf3106f4d6250d583407575fd93c66cf8dd9541d9582d321. 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/TCAIQ2493980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccfcadf141ab3311f2be26fbdceabb64fe68f57c2a75b5866710d4b13b5659ea. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCAIR2494405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3320e2b947385396f80b46e2af69687a5381aee541bb3db2013fcc3a021c1a00. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/TCAIP2494327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a443778d4214363388f11cdf588633bf3d5654c84a6afed18cc7fd995d6d7af. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/TCAIP2494488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1e373228304b93758863a82c56037ebbe023a5158b7275ab684b492038b093c. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:10:55Z), 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/TCAIP2494533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88353a938702298da874944745ed15c5dbee2883735a50fb3555afa817362a85. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCAIP2494132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2105b39580bf76c03e0a48adcd715592e1d7fca8f753324684faa56837a121d. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:51:10Z), 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/TCAIP2494510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e8922f8fc0cd95bf405fbb5b6c6d4d2a1a03993da7034df59f3ead8f4ef19a7. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/TCAIP2494103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d049675f1dd6be82aed92ddba87df65ba7709ffb5b222e769ad4a6a0788490a. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/TCAIP2493725.