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 0x976a9833b83a7e028aafb3ceb956425e3620d8ac08e2f7e40c831757d2f4f93c. Chain 2 (Bitcoin): anchored in block 953817 (2026-06-15T18:10:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fa17a95b-7f02-4da5-8941-20ac3f60f83c.json and https://artists.proofprofile.net/proofs/artist/fa17a95b-7f02-4da5-8941-20ac3f60f83c.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 0xcfe34e03d1577d31fa05792acc807573b7db6ca3f409ebdd5d961bb899cdd072. 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/GBSMU8295634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xade6d575d52b079f24523326047c657427216b042b6a108d59006f09b2a88db9. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/GBSMU8295635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafb946e68c3775112b2f799e306d86f9e9f111c1ec16b2f83d858102cfb9b6d2. 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/GBSMU8295636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5dac1bd291f4eb824d4758ffdc2efd0d860f3472361c9496f6f8163ce1b07c5. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/GBSMU8295637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4499a67197c9a40c68dc3288ee43d0e7e7ddef09fb9e9b660c4e864929960864. 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/GBSMU8295638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd5ad4b9140c6080d4a7c476ed2c9ef0133a35e7ad3c9c700529e3292acfde12. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/GBSMU8295639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb5c4ffb5aa419c416c37bc015c0a8dfe011c595912d610bf04a67360019403d. 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/GBSMU8295640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd53c498c2f9b8f46dbea6b3897758aef666bf46c597b0de394fc4ca73ca70dc. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/GBSMU8295641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b368b501c4138c2deb2103f8d61675f4c9a2b83e697c029a24edc95f8453dfd. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/GBSMU8295642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d5573796904326c7c0965493f361283d3f4ad5499c440118ee472179deb5ec4. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/GBSMU8295643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dc7a78fc9e1e6f0c71aa43237a7315240a87f46b2d693352dab674b27e69a3d. 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/GBSMU8295644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bbbe7e40fda1ec477cd287d9f1c32825bd69b8b33ab2445a979e7511b5c42b2. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/GBSMU0067546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f17aa30f00ee8bc383e5a5edf6bc43da27bf557a228e4e796ef5cab19cdf6cc. 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/GBSMU0067547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1c28fef1bcb3103c08ccf02cf2621cc7aa7914a467290e8c96d3d5fd5e1f107. 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/GBSMU0067548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e5986bd9876309cc8c83c09b2427f32235e0e54ad1ad34827a8ae00e2b9b99e. 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/GBSMU0067549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07096fa0b689b691f746e7b8ecdca9c012042f62b47c99d26e0abfd5a020a3b6. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/GBSMU0067550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d9f0b2fea97f3540af7c93969e028faa9424bb3d6607412f4594e849445ecc3. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/GBSMU0067551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a3ea46860514815b81d5a270ed7f0ed2e3897aac9c0941b0dc867f7437af9a0. 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/GBSMU0067552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x913db8beb0add1a40389163076929f562546e814d4e9df4b4f57c9e71b9cdf29. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/GBSMU0067553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d0e1600784eedb128599cfdc5ecb36ddf8b9949fd4cae1a1d5dd41fb4d6c5a9. 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/GBSMU0067554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51499c97d64c6c05289da8f51483406b00e74475140f69e096cdcc02354feeaf. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/GBSMU0067555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98b7a84e639e9066cfc1ab1085f0893159417297903e341fd12594858fa555c0. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/GBSMU0067556.