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 0xe36ce90527948b81d65d0095610bf59660c6aac485558958fa3a684c4cf28dc6. Chain 2 (Bitcoin): anchored in block 953667 (2026-06-14T17:49:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/576f8430-5dc0-4090-b496-b030a58dcca8.json and https://artists.proofprofile.net/proofs/artist/576f8430-5dc0-4090-b496-b030a58dcca8.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 0x3d327b5ddc40e28db95b1ffce9a8770f8829a42d4199715069ed7da04f5b33d9. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/GBWUL2465951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd063b3277c43a0f645fb7133e785379145ed5465bf8b03cd2cc909ead069cbf0. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/GBWUL2465953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd76d4fb43428a5011209ba6bb0ad94040318fde2a184135660e733da75d00b45. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/GBWUL2465959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a22dfc79b6ceb943445c1b932a4c0165a3ef27032f2c9c5056e5a9bd1edab54. 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/GBWUL2465961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f857156535ef498a6eb238134753249338b9c329a13f7e69b2d3a10f3db7374. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/GBWUL2465964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58f0e50e7d391bf58b45771104c629559d27aa13e5631485d856695fe5176df9. 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/GBWUL2465966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8db3cc56af9e6ae6adc95e1cd094818a9715ca79482be5899d25656b388d7516. 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/GBWUL2465967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1196aeb23087f5dfc62bd1330f78cd58fe47f61320f5f41c34a9fc5b52f57f37. 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/GBWUL2465970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa1b9a8d222084ecde385281d004ebafacfa94da94ae19d7e161047597eb79f2. 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/GBWUL2465972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eafab8be924c2843a5693ebeda58f687fa5fa074e6117d7e23991b848692344. 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/GBWUL2465974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf79b8d944bbc66a63565374e4206114a80a7731b1f0ed0a757ae061121d53883. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/GBWUL2465976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93cc4df6db7e13b416f45494b133b24142c19d1656f8aa6f6a0b1ec2ad3661a9. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/GBWUL2465979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x413630a7b32711fbd6723faf09523ad4cdcd5f9d6c7e477485a4c8df3004a37d. 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/GBWUL2465981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62236496974618c13b530e22ccebf7f59e9afc14a88bb47140b5efef6071bbbc. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/GBWUL2465983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a0d4b04b85a76e0c9bd366fc8f19f9380528c4c4a5829a46ee7d6d1e4c3dbe7. 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/GBWUL2465985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0977ed9a7723e30635e17135f0e8893dc245486482083c09ceae2a80886a28c7. 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/GBWUL2465987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c97e0c043c4aef4c42c89970278914e5c2f4b8947527a72ce6799e1d1326c99. Chain 2 (Bitcoin): anchored in block 958417 (2026-07-17T12:56:50Z), 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/GBWUL2465992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2bc13ae3da6cc88ee4e8b5b5c77c5dd4a442a0274c2065b3f05520515f2c0fd. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/GBWUL2465994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa451292db77b4ca215a1a98b1721e5ed2d01cf711ad4f74a034fd8455862fae7. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/GBWUL2465995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdee91e0f1ade17f675757b71138beecf092f0ad245cfabd11faf227fc88af4c1. 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/GBWUL2465997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57e86afc21dde5fab8f2f43f312b827837b3653395ffbf5af87f1fcf86347af9. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/GBWUL2466000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16ed559886c157a6c8a451fad14a497b2a6b5434477f42cea5a2dee77b16efc1. 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/GBWUL2466001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb60af4096ea9450b230e9b00c1a548a34e90b9129022e2a5894229b6538c29d. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/GBWUL2466002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x203dec8af6bb986cb4632ca9920d7e5f207b9ab9fbe2cb300286d7e332188ca1. 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/GBWUL2466003.