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 0x56f5d025470614206cf16026feab09a1b7886bc3ec8330f725b87b9049fce5bb. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/550588d5-cc67-4cdd-a820-8a0df27d477f.json and https://artists.proofprofile.net/proofs/artist/550588d5-cc67-4cdd-a820-8a0df27d477f.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 0x9c61cf2b9d0b15679575df18a33d27c0f88a64703e418184a7cd466074900964. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/ES86A1100012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc78d6ceff5d150d6ef2209958d18ddf4f163e2763728584f23f5f2f5681ef170. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/ES86A1900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb2e72867f81fe9d8339b2eac4f56f8849706463fbc60605537b9b0bb5f399a3. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ES86A2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43f1e3928c3bdab9e4054f8c0fc89125ea4f5a14a712e2b88ab5d2d9cde37f33. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/ES86A2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x248e76543ba267d6213d9fb55609e7fd9256e5305e930d26c3e5ad1f73c8e3b7. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ES86A2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb41f5416af73497f8193f5b83d6a0bab9ab49677ae2af3d4d9532c761b6af91. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ES86A2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x815fbb5d7bb17c7ddd4406887a4a609cf3fcc34f54d6512062e2fb8ef6672814. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/ES86A2300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5f519c5546a36dfab566a6b0bb4277eac38d9f3696dc9a81fb3bde9456de4c8. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/ES86A2300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c6fec90ad10222ba08799c535b9ff28b13406dd5f13d09869f98c19511521da. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ES86A2300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71ba8d5b308281d48ee05df0d25b1dd9aff9001bf76e15d107602bd780c70762. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/ES86A2300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x359499b572b32409a501191ecf82afb27db8695c841bd99fb0d533f0b06c1c52. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/ES86A2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8834e9598c01e998e2a69da40634b2c0cf06485fb8ca86e1d97f91475de15e44. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/ES86A2500006.
Tracks Laid, Tracks Covered (The Essential Vol 1 & 2)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe93b2fdadad211a6ca6e413c027c2428256d9e1dcdc7355c1a7051dcf7923b1. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/GBLBA2200567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29ee2381fbc4f1fd2ad83611736651079d48b4a3dabeaf93f6b7b62b04ae523d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBLBA2200581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x925d3c88a26cd79af6cbdcebeb1ea16386e57060272e2cd45b36e4e727d8c002. Chain 2 (Bitcoin): anchored in block 960157 (2026-07-29T22:12:10Z), 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/GBLBA2200585.