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 0x1ebec2780c9651055fbbbd2d6cbd0bff0ac0abf637fb514346e193c1cf2e915b. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/09d1d4c8-c21b-472f-9a26-d45c5656c78c.json and https://artists.proofprofile.net/proofs/artist/09d1d4c8-c21b-472f-9a26-d45c5656c78c.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 0x79aaba79b970a04c24b747ec3cf1d1b452f7d84c8a42ae99ed05363482200fb3. 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/NLG662200121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1e885acf6692faf552afbf87c978d699edf870c483aa291472a33b713d844ed. 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/NLG662200502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c6e7c7eb3989462468f3675b8d50e23d2b420c4216bc92e6897d2b9d63f20fa. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/NLG662200035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ebce6822c4f7fa462cb338154510bf7dbeba61bed51a8fbdf08050dd0f7eaba. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:24:46Z), 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/NLG662200374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef4a0482399af3ebacad79b442130c33a3c0a727aaeb97fcaac291636dfe0306. 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/NLG662200271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79aaba79b970a04c24b747ec3cf1d1b452f7d84c8a42ae99ed05363482200fb3. 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/NLG662200121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc92dcb3bd2f0c4f0d3506a6e2a743eaa65845bdd4e7892af44272260d9c768e. 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/NLG662200272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20f3e1e531717cb634cea8a599143dbf68f8ed635dbb6bf6f144744a6f03fbff. 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/NLG662200187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1e885acf6692faf552afbf87c978d699edf870c483aa291472a33b713d844ed. Chain 2 (Bitcoin): anchored in block 956748 (2026-07-05T05:55:59Z), 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/NLG662200502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x360f6f7fc5bb5fcf13d332649f54719583e2c8f6a7a8ee8867ed20d3aecdde6f. 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/NLG662300440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa165a6e435f1f849efff132b9581089d02504c908b2af5c832b422a5ac6fdce8. 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/NLG662300388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x360f6f7fc5bb5fcf13d332649f54719583e2c8f6a7a8ee8867ed20d3aecdde6f. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/NLG662300440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa165a6e435f1f849efff132b9581089d02504c908b2af5c832b422a5ac6fdce8. 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/NLG662300388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0978cc9db1439cf9ecf695d4ed6965c40a0cff712589e708a22acbea403e50e4. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NLG662300675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86f3d262d3648a54490fc40a25c6a2aacc133c281c1aa26e0b2eb8f95e3b4cb8. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/NLG662400096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a68851e2d446a4061c1bef6e227138b7d18cfa403368c785574d4d83a04bbe3. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:23:40Z), 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/NLG662400097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x684914bcaf15cfb67c80e5deaab84c499f9b48e6f720f6cf78721b58f54bd02d. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/NLG662300519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x700a86dca68bbe5d37418cdd122d639642569b06d5a57ff0307c3be8169129f4. 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/NLG662400098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x230ad531e1c16610a56f5d905991356cbc57f1fa8f75e4925c2246c3c729da12. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/NLG662400099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9361794b628aeb375f34a270f8140a7cf2994ef7529ad0bec5de9b264936ce46. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/NLG662400100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e6519a875378c62233ec30f1c13874bea60ad2c3f7c06ea9fa4d3f68792d24f. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/NLG662400101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8296abb3a0ac6035c5fbd70ba593c50e5af28bc942708335a765d67b99fe9d12. 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/NLG662400102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdae9b5729fb651323308c2dba7a94de190521d870383ada76a216e7cbb8ba288. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/NLG662300518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0470be1a95c72239971df86d871aa9406ef15aec457980b2f6e95abc862601f3. 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/NLG662400103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0978cc9db1439cf9ecf695d4ed6965c40a0cff712589e708a22acbea403e50e4. 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/NLG662300675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x360f6f7fc5bb5fcf13d332649f54719583e2c8f6a7a8ee8867ed20d3aecdde6f. 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/NLG662300440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdbabf3d6e41b6eab5ae1cf498d1c383d5b9ee4ca6f15ea5ab0e0ad5c4f914f9. 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/NLG662400104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb35cd1ff8ddc27cef7ecef22484bf05a1e2007245fe022584f51cb1cfbb722d. 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/NLG662400071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ae0b49528823cf308334ece65d3f0459213e89736f383ce1820bb7f3dbf1686. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/NLG662300806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa165a6e435f1f849efff132b9581089d02504c908b2af5c832b422a5ac6fdce8. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/NLG662300388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13e5555833fb33959efca65102e19ddeceb10432dae4b5a3d92256556c42f7c9. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/NLG662400105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x692c68bc774674372cd2a30fe762095a3a4be6cef0bba886a0c629951d283e45. 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/QM6N22473281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb29a14c9c6659efffda4b43e4fe2d8fc5456c32e9abd9b9c24e0cfa4558278dd. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NLG662300486.