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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4de3cee49a273a4f33c55f173acd92e81cf0956d5881f783ed4b36d3bdf6d39a. 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/dc1a9fd6-218d-4944-a84d-6030c20db658.json and https://artists.proofprofile.net/proofs/artist/dc1a9fd6-218d-4944-a84d-6030c20db658.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0c2a56471297d4a4fcf423fa3aa75385931ccdb5625a540e260af9a62b3eb23. 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/TCAHT2484077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a08609a85c68bb17a9d338e6b43f279f8dc227eec55b4dfa1d33d1fb9ecbcdd. 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/TCAHU2464049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b2c0e01d057f7a48f9ca24c476b8bc9a9dea97ea4f89e5b4465511142a29a0d. 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/QZDA82415735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b2c0e01d057f7a48f9ca24c476b8bc9a9dea97ea4f89e5b4465511142a29a0d. 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/QZDA82415735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x447036e4e9108c3a896a73a97c51ae638e86f37ceef2bf6f6e684f3fb28c5884. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/QZES72417651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a2ac90490647dd9a615dcc5096817f4a326b6e410e51e9cf7cdf25c0ede39cd. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/QZHNB2471109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a2ac90490647dd9a615dcc5096817f4a326b6e410e51e9cf7cdf25c0ede39cd. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/QZHNB2471109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dfccff76211cd4275d98eebb7b32063119380a29f4326146bba0abf39effcac. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/QZK6P2409019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dfccff76211cd4275d98eebb7b32063119380a29f4326146bba0abf39effcac. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZK6P2409019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13b050a8798a46c266ce88718b7bf478538e55cbf9ffbd139c8cf59e3b51600b. 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/QZK6N2437353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13b050a8798a46c266ce88718b7bf478538e55cbf9ffbd139c8cf59e3b51600b. 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/QZK6N2437353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d743d143d51b2d6f40d5cace52b9e3f12693fd9f7663c0022a2cd5e515347b0. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/QZK6M2434672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d743d143d51b2d6f40d5cace52b9e3f12693fd9f7663c0022a2cd5e515347b0. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZK6M2434672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe2d20d83d5de1171d43122d0b7596575f62c221da1b6ced894a62922ab846f8. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZK6M2435930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefce19f48833e5c5c5bebeb7624a69472467e893ac5da66df01a6ebc5c53ff6c. 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/QZK6K2402756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefce19f48833e5c5c5bebeb7624a69472467e893ac5da66df01a6ebc5c53ff6c. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T12:32:15Z), 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/QZK6K2402756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2673206c283f42f266fb56250319f9a70c4ce7bacd65277c346cf984d5a1cfb1. Chain 2 (Bitcoin): anchored in block 958658 (2026-07-19T04:09:09Z), 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/QZK6K2436105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86445093f5f781b11fb284581eaab3f14a89f1df02e1700c7dd2dbaf21162e4f. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QZNWR2419379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86445093f5f781b11fb284581eaab3f14a89f1df02e1700c7dd2dbaf21162e4f. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/QZNWR2419379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01260918d912b2aeb8ab53a06530a683d231d39a989ee655da9cbef8dfd4edd8. 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/QZNWR2421503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e0906b4133b1e33727fa61c3c6dad418ac6f0607f491a679293fcc3ea7166fc. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/QZNWR2406639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc74db74bbd966c794e1febc734d0474e155d1140a2455d4d7690f833bab1ad61. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZNWR2407637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc981f731dbe1acfea55a457aa3c0728c0273bfa5a7f106226a4f749deb7d0719. 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/QZNWR2421584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9513e0dcfc2257f1275fc7ae3f3af04d6d0647ae2cdd5e1320a6d553d5091e6c. 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/QZRP52438352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x524bce9cb82994259433ee1acb3aa2bc17e871e888c08e92df4d8e3894421f59. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZTAU2470413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe46e7c6a787bf1bd7433b45f3b094794116a06234d3ca6003c6f5597f51afe84. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZTBC2487915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe46e7c6a787bf1bd7433b45f3b094794116a06234d3ca6003c6f5597f51afe84. Chain 2 (Bitcoin): anchored in block 957552 (2026-07-11T10:04:42Z), 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/QZTBC2487915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad517a3728548acdbaa290b34d5af87aef8ea5b50161a5465f06e974ec3e5fda. 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/QZWFN2491758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0713d81419ecc9a54efde4b3ba779fcef18a07f8c705bfa734ee2dfeeb6d1165. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/QZZEB2499795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3ba69cbc6b82d4716b9d875f75bd5a4923505f231185ad691dcd5751366b89b. 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/QZZEB2482676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3ba69cbc6b82d4716b9d875f75bd5a4923505f231185ad691dcd5751366b89b. 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/QZZEB2482676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc8962d0903f4d314b66cb7c8b6a0c3b01fd3db8fccb03bbd3065ebec3ff695d. 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/QZNWW2435546.