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 0x83415f47aa77f41cbce8e572b4c34ce4e0632c191e408b5dc2b3edaeec8eabff. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c28dec55-d5dc-4dde-9ded-46d942d282d8.json and https://artists.proofprofile.net/proofs/artist/c28dec55-d5dc-4dde-9ded-46d942d282d8.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 0x2f023f4d6b7fa853df1027968092ec1227cd0e4f9578149f5083f174602a6457. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/ES71G2210577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x383477fb2470ed4fc53eace9826ffd2d2a8d13d14679bfbf8cab03decc6e2552. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/ES71G2210578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a36405696e19f8593caa33d32def3568e8967e221981688e4b955e18fc8003a. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/ES71G2220019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd315f9925b89a8278117d87ca34cce7866ea636a8e35b89d30a4d666320bb9f. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/ES71G2220020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd5e583194446c928b1bb7fcadd21892e3f9bcef10b10a99c183b2ec7147172d. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/ES71G2220022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7687e6ab9a1817f772de2db7638228571be4486f7ad3b62de0a05febe9a228e3. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/ES71G2220023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9092c35a62e3a787ed151284b40f7ace344289e4f523ea68282e9fbbdd22e2e1. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/ES71G2220024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69108a895e2f7766cb2d859ed71baced864d92485a187e4ff2ff8a2fd2d9023f. 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/ES71G2220025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf94c09bbe65e8138f450ce1deee9e6c5c9da634845d0d22198ab1d4461973db. 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/ES71G2220026.
Pretty Polly Perkins of Paddington Green
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea6622e171fc370615f7b34cf70f44a1b39b72cab1ce3958893d235edf0e2660. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ES71G2411862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e889305ad6aeba535275ca0c13ce554bf575f51dc77f39fb48d595617daa89e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ES71G2411863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfedf8defb0074c32838818f14f04787470cac2aeefc1847e46a6f128140f220. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ES71G2411864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6980cbd0a36afbbb662f84bcf8c7188a933fa50e4a7b4953e80dcdee5b707921. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ES71G2411865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae645ed1b9a3fadb83a64b471e6e523b02b77e39167f46e1437a45d96411e007. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ES71G2411866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50229efe8a20715c03feaf031c391bedf92aa27afca9fccd16f23d850c9a8eb2. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ES71G2411867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e8ee088f1354d7a57536167e8a4096e91ab6c6d01168e89424dd33cb8c66802. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ES71G2411869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x561da1f64b9b9447de5dd3d90f908c6f426922ad39e389ba14b1c2e68f7e1396. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ES71G2411871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea6622e171fc370615f7b34cf70f44a1b39b72cab1ce3958893d235edf0e2660. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ES71G2411862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e889305ad6aeba535275ca0c13ce554bf575f51dc77f39fb48d595617daa89e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ES71G2411863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6980cbd0a36afbbb662f84bcf8c7188a933fa50e4a7b4953e80dcdee5b707921. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ES71G2411865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfedf8defb0074c32838818f14f04787470cac2aeefc1847e46a6f128140f220. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ES71G2411864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50229efe8a20715c03feaf031c391bedf92aa27afca9fccd16f23d850c9a8eb2. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ES71G2411867.
Little Miss Muffet - with Rain Forest Sounds
Bedtime Piano: Lullaby Collection Vol. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a4849d1fb22a6adffb881ecab572dfb3cf80eec10ecf657d1a952cc5502348a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ES71G2314080.
Caballito Blanco - with Rain Forest Sounds
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04150a20635410e59e8e0ea953a97ba98b1ba3386b7dfca05bc91b15b3e87a78. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ES71G2314085.
Ten in the Bed - with Rain Forest Sounds
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99597a1dfeae3de74cb3d05577d76c89b92bfceead05cef0228e0c5fd98776e5. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ES71G2314086.