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 0xffe469b20010ba3bf175d64c4c26ea2445a15ab16b03300fea38163e72730080. 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/a1476e17-f63b-448e-87fc-c9da6b0cf197.json and https://artists.proofprofile.net/proofs/artist/a1476e17-f63b-448e-87fc-c9da6b0cf197.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 0x6247969afe4f7f6a63d64167d1c1db61081995ea3d26b591ebfb2cddf49a022d. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/QZ76Q1810001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf55c46669695c8cc56acc4954433b36d4e6aa3e646e1d3102bb2e21dac93a038. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZ76Q1810003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e0157bd86740ccb1a7a245b37c48c2b8c0ae507fb9ab2bbd9361317cfd716b4. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZ76Q1810004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4953ae9a294c6c580e519de3adc0526b1ac3afa29f4b4bcbabc1863c44d7582. 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/QZ76Q1810006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd33b29f70b19bfd7590fb3cdd0beeeab284ad79817a7d4dbbd32d93c0d641950. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZ76Q1810008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe167e41b5f39bd77c37008f8b8b41a98c1fc20fc3d5df64a4af7b2f37a986082. 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/QZ76Q1810011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9afc984f757b3daf5bb2e8af91bcc1a2f90008c3276cbf146110605546633534. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:45:45Z), 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/QZ76Q1890002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec1a92e1e3302ea6462ae02f9ddf15aca479bf86ef9d11e36e1290dff7007aa1. 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/QZ76Q1900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ab603f6d19acf74cb19fb228942149aee69af981ee56f1519a133a8c8b47ef7. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/QZ76Q1900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c9592ec2e1f9a46a6daeb040f9c2032d4fcac571564beb04754254c733ae2bf. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZ76Q2000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e9641cfb27ebb6396775e7ce37f1da890205a51ac0298de1d111bc2e8710189. 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/QZ76Q2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49b688ea7f73a9e8ce44a9b619576c4b9896cf6e19f255565dd08aac092a3d11. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZ76Q2100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02f927b8f9c5603e633cfa943acd685c9cdb25cd601b7704f4200e8ffeda3c14. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/QZ76Q2100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b4a58518c3f3600a661d49f3f44c503f915744514a3d94ba83add17e160eba2. 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/QZ76Q2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4b8f7938dacbd16ee3a3167aef1c3de9033082225ec0cf917f77c876602c447. 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/QZ76Q2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x413722d8310983f64c42ae58cfe5b54c599a434b90ff1d7de7a31913be42a8f0. 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/QZ76Q2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4f0f765185dc51e0671aa2908caf53a2349c0adca2b3960f86bb1dd13cc31fb. 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/QZ76Q2200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd51d4190bb6a53bd8ed5e71afbfe23c9679e1f96d7a09ab46112a8b8d64f7605. 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/QZ76Q2200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bf92a43ee8871d99cfd7a4f88346c45792a85321c3bb9b64b1146ef875125a1. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T03:00:55Z), 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/QZ76Q2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e8178ceea183fb3b640421433dbd0469dfec700ba395c974e2ab9cf8b769ca9. 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/QZ76Q2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c5c8fb007763610a82ed5088230f86e0640175f20f127452f38ff756b0b3504. 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/QZ76Q2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6de788b119ad42c4a60737eff31f25d50941a94d90451dc41a099249d3fababa. Chain 2 (Bitcoin): anchored in block 957852 (2026-07-13T11:25:45Z), 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/QZ76Q2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10417553f83f9b5c5c3eb480ba30214b781f2e2aa16c1561787be737d90b6327. 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/QZ76Q2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cd646122d85bc15a9607c5d5f2a98e386a936bc8e8bb96a7f63c01987e83300. 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/QZ76Q2400005.