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 0xef1527020ecac6a0a69d7d7fd0b4874815b64888503abdd3dce56a3699b68314. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4209de27-20a4-4124-828c-5165d6a1df61.json and https://artists.proofprofile.net/proofs/artist/4209de27-20a4-4124-828c-5165d6a1df61.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 0xa9c27855193e40176a533d11b4fd04fcfdabc5b010aec1501460acfa3e6590e4. 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/QZES62066533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d99dddb7dd976e44306770666b34f61cc408a5f68434ba0aad98c22600af83e. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:09:13Z), 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/QZHNA2043742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38b6399126ef974bb42ed270961407e0548f232ccaafa988fb097bf8a364acb5. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/QZK6N2005187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefcce82a11c4c9a5f30a346a1fd9d5daae9947c105ee07e1f1eff34b321ddb1b. 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/QZFZ52145449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d4ea97a84eb94e66f97b1ee062d9a31cfe1e930ea024c6083c64783380c3656. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZK6K2132728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadcc7a3cf7ef590c81b666068f25776013d4922abdeb683eda2b57c3900a5c17. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZK6G2165807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98cd8e6d7b07e4270f3af5687ccdaa63cf587b075fba910531a58bc48c6b883a. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZFZ72224282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcb3546359d45cd655f45ce7f0f6a4ca4ba1606641cfd7ead86ecfa9e1371cd8. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:15:13Z), 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/QZMEQ2245117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9f3b790a23fd7b7ec7140b508e6729ae2ad77c9df6b9fca9e593767afc6af95. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T11:03:46Z), 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/QZNWX2294909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3abe91189901250c4c8652e46d5bfbdbddcc6f6bde20b1b12d50b68ee00b9d4. 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/QZDA52334878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b04aa0d0b8efc93388478c736839fdfc7155b34a0dc43833d659ded0aaa04ff. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/QZK6J2322421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9aa645dbdf51b80cabb1b3a3ddc6180c797f9c20d2346e8dc1b7fbe04733a41. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/QZDA52471558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5267c522774ce4b39436ec044440d13b15d23aeefb6a355811a77b918dc62f5. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZFYY2534787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc67379bc03b18fab792867aa5faf1bea31a0a719ae5ceccab1f7870ac97ed11. 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/QZDA52583037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb46394f279b20910015f3a1e48519ead30bd8fbe63410206b2c1aba51379a786. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/QZDA52583675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2db2e3d89e528b0d64219c43672fd87fa0b89ae11a91528ada133cdbd5cca9c4. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:59:24Z), 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/QZRP52320737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x033bed441985bfab589faccacaad7be3a67c55438c5d16963a7bfb5c05446e3d. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T23:03:00Z), 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/QZMEM2383066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2b6bd12b3b9bd64129b56f278c09551982711265c941a174e2e14737bbe7303. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/QZMEQ2373563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd569a1fac0e19584f15a50646e25125f77a992e158874f6bf048655ac857c3ab. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/QZTB82575603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf1bf021459cd143432cdd6c8c82d93586d680de51b95314607f61f95d666a44. 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/QZTB92534672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e7d48c3822b27495ae5dcaf9aae509a8f6674f2ec78d7398e8920141bdf0ad6. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZTBD2598518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa14592f7b8b8607f6776e11ba32e4717cbd953373e78134585c1b1bf13f81cf6. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:06:01Z), 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/QZZ7X2507345.