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 0x44f449d4b47da0d2cf1aa3766824c3e98dd5ab4835b0bdf5acf97f2eca785eea. Chain 2 (Bitcoin): anchored in block 953704 (2026-06-14T22:58:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7a850006-600e-42f5-ab54-26c17aaf3983.json and https://artists.proofprofile.net/proofs/artist/7a850006-600e-42f5-ab54-26c17aaf3983.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Calendar Girls (2017 Original London Cast)
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 0xb5b00a6096f88bf98e537bf369b0977dabe3ab0c2c0b4d4414db8ad68e29af06. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/GBUM71702415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x733f9bc33cde71453a7d045d61f9a74a9dce575741999d5c33cc01eef36659a0. 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/GBUM71702401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49c7278f62d2035b34889e40b490331502d6c38873e676767074c3832057f7f4. 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/GBUM71702406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bc7d98a53a0c3a05a799aedfa995674ef11099b7afb7810b4136e086b313c93. 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/GBUM71702414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16f0069811ff4b90819c73a500bffc8bfc45a02adc1c5cd3184c5263279e54e4. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T01:42:16Z), 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/GBUM71702412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d659fe4a04b40f5bfa5ebe522510b126f92db99d2962756ea7b85a7451cd5f5. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/GBUM71702408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9898e2cc06bda456ea8373e0df21636170ce786a09f745de7026a7b6dd7fd8d. Chain 2 (Bitcoin): anchored in block 958947 (2026-07-21T03:34:47Z), 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/GBUM71800270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2c4e85cc043458aa7a0a6272fe1e33cf4aecccacd8c322d1f275af513ce0bd4. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/GBUM71702411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ebb9ced2caa26947debbf8e9edad80728ab9d59838d74ae58f5c796751e4867. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/GBUM71702409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6859a465664d25dd5cad163d60756b3ca8cf88ff6f59d7aa2028fb1bc690c4dd. 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/GBUM71702398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bdf5086dbb3ddbaea5d8a5c06cb0a9e72ac00457d7d779af9ef7b0d91bbd4bd. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/GBUM71702405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc68bf270cfac2cae766af08b0aa7c5d15e2bbcba93ea804849d73bb784bf377f. 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/GBUM71702407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4314151de4cbf065946070a4ecc9be18a41f30466f7992f2b2e9349873439d8b. 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/GBUM71702403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d6c4aea62e8e226b98d9b90024d740d3728e87555cf38599876580151e4edfd. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T16:42:41Z), 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/GBUM71800271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb119fc5cbdc3ca8083f671e527aed21c9627841a54e4db5fa377bba24c35c617. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T08:54:16Z), 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/GBUM71702399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x766ea5b23bc8b08a4c5089177dc2b51b5b706bac60f01def64b2d5c5770448c3. 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/GBUM71702404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d020de3eb0c3de9e252eda070abc34800d088e0e42bf550609fb99cf0e98dd7. Chain 2 (Bitcoin): anchored in block 958695 (2026-07-19T07:37:00Z), 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/GBUM71702400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67fc9e43e8f78575db11f995ff7a468797a2df4c1e865451b314f5f6d978f410. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/GBUM71702410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86530d2326222f846ed6fd290bd88bfd3de9fd2088f601decd5db6374a679e65. 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/GBUM71703858.