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 0x3f2855166ca06ce2a966720910ad76ab7c6604b91dc59647f984cb951fdbe2b2. 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/74d9f09f-910e-43d3-bd55-a90a053d6dad.json and https://artists.proofprofile.net/proofs/artist/74d9f09f-910e-43d3-bd55-a90a053d6dad.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 0xba77cb1f7687d80c0f29c9765d1470525085af4f7ae9c255935761d9cfc6dcf3. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZWFN2334229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4f0c53b4d664c76a4a6692c6389b7e44c3e226fcf75e5f370e9eb6a70479c9a. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T12:38:32Z), 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/QZWFN2334230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5904e2c4e31a42b290a3a8608408c5f561d026c233121e3d14695847eb011c7. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZWFN2334231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x189987ae94a1476be928f41f0fafd963c289a0199997334eda500dfb9292bf99. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZWFN2334233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12c0b2ff7aecd1be8317993b95b332b210bff1771d5cf94e50217a00eac79da2. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:35:39Z), 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/QZWFN2334235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dc70cac7cb6677fab09cb80e53ce90cc902d6c25a970890d71452fec399ff1d. 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/QZWFN2334237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd67212e4adc0c3d57a529a9fd8a6e3bdb33d239f12fd9b7b22ae5307fdaea30e. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:54:32Z), 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/QZHN32315996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98ccaa77611a61be6958def5a5b9c660f014f813f76c7b661775d8affb31f0e2. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/QZK6M2459836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4d895765b514cba366b9f2e60dd2c0a6904130b925639e62bd270336e757c84. 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/QZNWV2459008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f60ae9e1fc5ae46b48e2d5e23b353eb20d750fece21c336ba7d1ae1d951e471. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZNWV2459009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36e7ebcae12050399b9facbd6848d3df5e627d7470f67cab5975295addbfc861. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/QZNWV2459010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc62028739a93e62497c4cf0290f54b5d78fa7a9b021e21dd7d80a7b373150c0. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZMEQ2458603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda061873e341887b011ce5058f3ab94e6ce7b057843dfa7b97ee4a44f1af6f53. 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/QZMEQ2458606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4d895765b514cba366b9f2e60dd2c0a6904130b925639e62bd270336e757c84. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/QZNWV2459008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f60ae9e1fc5ae46b48e2d5e23b353eb20d750fece21c336ba7d1ae1d951e471. 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/QZNWV2459009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36e7ebcae12050399b9facbd6848d3df5e627d7470f67cab5975295addbfc861. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZNWV2459010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf5b3753f3070e42ed85567902b11a5dc96899a344a686cbd8bb079cec516873. 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/QZMEQ2458600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9c857ddceb7a87d4e8579077aa440596aead70316273424efe9ee93f3572f8f. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZMEQ2458602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc62028739a93e62497c4cf0290f54b5d78fa7a9b021e21dd7d80a7b373150c0. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZMEQ2458603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7df42bc47770100d4643d8ece70eaf1ab500cd5418d8a62729831d24bff661dc. 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/QZWFJ2495879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41bd5979cad16e16a316e78eba58f6273cccc99d51d40555c7dd940ed3aa439f. 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/QZZ7P2497408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3935b4c7cac79b24f06d2d2e024b4c199c425c7e2457c74084cf79973bb13974. 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/QZK6K2560476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55115c4475b5bdbd618e3c9a6ad038e40e87d54677a9d0b77e5db701206f6713. 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/QZPLS2502471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x889a4b29d3b13a5cc0352356e481895ded779ab5655e22df1a7be8df685acd17. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:02:07Z), 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/QZPLS2502472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc04ce0db120b46526236da6210c637ce38cb20b945083baabbf24e2b00a1c04a. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/QZWFP2535417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15238e0f200c8cd34888fe4445fdb3ab1e9662bc97de12e954bf6a282c344686. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:22:30Z), 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/QZZ762565251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9770f68c77d2325c5c17e87a9e4b31d40636e48494f70b0768586fd4ef7b0b13. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZZ7P2515571.