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 0x4d51675f80c32117b4a3438d93b3e665816b587ac9b866090c0d2e03776b113e. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fa7a86a6-4816-4e75-8c41-bd5911ccec46.json and https://artists.proofprofile.net/proofs/artist/fa7a86a6-4816-4e75-8c41-bd5911ccec46.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 0xb5c1d35c522dfc902c09029e9505982c5b01f3926f4e86f62faf12129c9bffa7. 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/ES09S2100238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bfb31d40ca8992c203f5b7519b4a292cb2a682ee5f9ac05215320da9e098463. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:34:43Z), 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/ES09S2100239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc908264203cd340102a5ac88cc496b0127af6540dbcaad295936855be8536666. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/ES09S2100182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9eb08f2e8018ab8bf34627428000934e84675330a41d5f48115c7180af565e5. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:34:40Z), 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/ES09S2100240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9fbd5279157f66e8d1e2d21a962570ef6c741db23144b832f2e1db4e4f6294d. Chain 2 (Bitcoin): anchored in block 958722 (2026-07-19T11:03:50Z), 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/ES09S2100241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5134c05d022c06ed22b25f2618426930dfcf8d560a8a9bb9f496523ed1fa12ea. 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/ES09S2100118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x742be05cbb05436e88712a258c6cd90ca9e5b837b28b45ee53f1d9cd97dc9bb9. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/ES09S2100243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22f53cb4d4bf55d84de077c0115a9c4416b70706ceae2e1cd8707338e694529a. Chain 2 (Bitcoin): anchored in block 959013 (2026-07-21T16:32:38Z), 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/ES09S2100246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1eccf7b80cb691da60532ebea7179c2274e10e070b580ba44584a3a12b84ef6. 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/ES09S2200097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x221d37e769064716ada2b5bca714661f58d09f3182f6498785af446a80bbb3c1. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/ES09S2200202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x680e176babbfaa2a8c36ecef4736b02abd1267ca1aca6d2fe790ef39c1b043e3. 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/ES09S2200204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc290ae9996442da0abf182515d131a971c211ad1328655ceff70a9acd9ec71db. 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/ES5702300355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17a945e36b6d0e7e11ee43be24a52932bf90bca24b2e801944c26a3e7b3c6564. 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/ES5702300356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa298883fad843d9f6dea36a60d00bbd6dacac993360e52e0d521562e399305f. 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/ES5702300357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10520fdacfc3d77582c33f30d627bc1a729f716ea26449f34f18576c82b80b40. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ES5702300508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae5bb133175ef193ab4b7b09c21e253986554c22b167ea3ddcc4faa451af54d7. 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/ES71G2500601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae5bb133175ef193ab4b7b09c21e253986554c22b167ea3ddcc4faa451af54d7. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ES71G2500601.