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 0x61c791cf907d71aa0f297ec8b1d5dadd619b1b54ee50abfd9c311b54a6d45fc7. 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/039a618b-0714-4278-b562-5b605e113dc1.json and https://artists.proofprofile.net/proofs/artist/039a618b-0714-4278-b562-5b605e113dc1.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 0x89fce400bfe06aabaeb65074f730e1cadaf691d2213a02f3f0d866637fd7236d. 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/QZK6L2089380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e527b64cf60bb73574fc8a0d6d1f934631a807ae451c6efdb492794a2c108f6. Chain 2 (Bitcoin): anchored in block 957599 (2026-07-11T19:42:17Z), 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/QZK6L2089889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47be4c519e97f3496ce94ee4b7d53b49588e66da91ee5836e39f1a76bc3c21eb. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:44:05Z), 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/QZES82046173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca3819ca82c446a2bd54579832290ca0648fe82370e4a41df2087fea8f2ead7a. 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/QZES82046176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a7385259cc91a5cca388951727c7879e486f56b7f653389e25d498079680d39. 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/QZES82046181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeccd1c3479cf2b76770e472d48c97bd88b05e9639151aa8a2c06598f0290133. 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/QZK6F2022604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59488f87a64b50a4f74ea1ba6812d360734bac895562a6f516e1e0f01691fa5f. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZNWX2186849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43b3d951aeb225fdcd99c999aaf9e046936f8dddd861d88efa766b6afa8a652b. 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/QZHNA2213021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2be679e116b73859580e03d9da2b93a8cb3115f36d6d9a40501733e70dc70ff. 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/QZK6L2290180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91277a7589b456c226f68fb836f95731625262945942ece526b1ccff189fdfb6. Chain 2 (Bitcoin): anchored in block 957603 (2026-07-11T20:26:17Z), 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/QZES72317898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e0aa199705942bb2fc39cedc6ed65155748f9d319892cffd37b65e04269e2e4. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/QZHN72319672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bb7fb889087c6c77c85d54cbd2a8e279fd184dcbeb7db98e0ae35b9b18f43e7. 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/QZWFQ2332275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1830154ac98588b576eed567f44471c55e48d7579da25d63ab03924bde39f7f. 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/QZWFQ2332276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72239647dee33c81a485cd2623f38a24cf7e0f70d90c8a0a5d1cf742f9b6b75d. 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/QZWFQ2332277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed21ef00e732a2c1565900be2a41b3ea7883a6a4bcad098c4f6575222d5ca61c. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZWFQ2332278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ea52916dcdc51da8fd726d7d49e3c555556d0324be485b2768cff7e1f0958ec. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZWFQ2332279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44f1abf946887db934a8f9df612c1528a74af449f00e1cd3520956c54923a42a. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:34:46Z), 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/QZWFQ2332281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfede7d4045ecfc8cdabbfebde8c057c5ad2010a97bb3a8e13aa5755351d71ba2. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QZWFQ2332282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25515cceda008940afae0cf2f90652aa04d81d8b26d4665e48c98c85838f46f6. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZWFQ2332283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x151147b332bcb5c77eeb5523693cceb1ab082048c9ef5a1ea63ea1014bc49f7d. Chain 2 (Bitcoin): anchored in block 957599 (2026-07-11T19:42:17Z), 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/QZWFQ2332284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5444e9edccb4af7606a00207eebe89ebbfba9be187e6bbe3d0759a7fbb9f020. 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/QZZ7X2485802.