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 0x34fdca8b54fe1f0354f990a3dea12f61f6edfcdc350f761f3d9e81750ce37e08. 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/609c525d-b00d-41e3-9f50-531f96eb13f6.json and https://artists.proofprofile.net/proofs/artist/609c525d-b00d-41e3-9f50-531f96eb13f6.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 0xf7df8537a10002530e6fbedcfc25ee3e6d306d7ec7dcbb6f2c83b77479967476. 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/QZRAS2440004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16c84e72e0d6fe4c29279c86c5956d69f70ba96e24a91cf49b7391bb42902d80. 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/QZRAS2440001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7016c6d2bb0f9152acaec322d262d6b75e28c6530088a52567f310965a6bda7e. 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/QZRAS2440002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x280935f27e02e725619b4122d003ecdfeb9d3692d85f96972db2c541fca75cfb. 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/QZRAS2440003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7df8537a10002530e6fbedcfc25ee3e6d306d7ec7dcbb6f2c83b77479967476. 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/QZRAS2440004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08960d1013d645f9fb236c311faa47c1cbe9ecd454847d717c109200f9c3b0b0. 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/QZRAS2440005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf65a7860d136eb41a2db69768e5f280e65f143be61f20a678734b9b3381784ef. 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/QZRAS2440006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1722a3c80835a651197050ab7fb1c3545194752be55734f009ce2fbbc36df6d4. 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/QZRAS2440007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x815cb1d5f271fe5606969a7b7c35051c613a62cf54221372ea0dd15fd9515870. 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/QZRAS2440008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa86ae807f606d5eafd718eb5b2d0785341a609a47e4d605092f0652ab7fd8f82. 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/QZRAS2440009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x324f4e23215b75c31b2304e2dae560af07507eb6d04e0f09328e0d0082cf115d. 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/QZRAS2440010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8770a89cb3cda9b760fc9b04257d8835f6f5652818ad3056f6094d7142e612ce. 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/QZRAS2440011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09fea1e5e27a0ddd66f74884280ef511fd8727d9d8852622da880fa6b5fc172a. 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/QZRAS2440012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61152e02561d12278d8283616c06b2b057659136f411585a60aaa1f2c0e985eb. 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/QZRAS2460001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbffd8c70ce588b123b533d0b4b5bec0c90d919c45e63c2be4e76b3222614074c. 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/QZRAS2460002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15c2c56690d691b83401fe90101549a7e55f563ebc6bcb044e0d03bf808422cd. 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/QZRAS2460003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x216b11e3a89a645b589d8fb09ef011ea0c44e54381381d60703a6f1faf9cfccd. 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/QZRAS2460004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a2db0002b05b747a63a70368904fadba4622a69fe33de255fc57c68e3c5fca0. 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/QZRAS2460005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7048253788c5af0fdaac03399a460206c4d62ef37d9d49be073e715a2a8fb192. 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/QZRAS2460006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe16e70eb8c99a219d9f95ab33cb3f1f34875dfe1b203b13a529c87eff7d97f42. 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/QZRAS2460007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf148fdd0b774c877ac9de725d8e3025b8a220bcb578ecde462f535e80598cd32. 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/QZRAS2460008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7858c6193b86d04bbcc9146a6b14ee3d95484d31f7d6bb79b1382969876102cf. 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/QZRAS2460009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbff063e14a57cd56f79d42d9e291b1d50ae90e3c07be6d6885b33f90dbd6aeda. 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/QZRAS2460010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a88b1504ac7445fce0550bc81207ed23c9f6712a164956d60680a101d09e1e2. 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/QZRAS2460011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafeba48e441801d44b8301288e7b01016144438eed772f8752c9c208320b8c12. 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/QZRAS2460012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x962e1a59e03467901b837d95d65f6f10ef183b788b74da9e7f768ec0bd1f9b09. 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/QZRAS2460013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe06d72076d3527a3e2f66bb04cf6c29e7a03038eaa63760134bf8483bffe9a2. 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/QZRAS2460014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02ca850bc4889b2277bf918cf86542ecd88b6d8f854191996ea58e3fc9820016. 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/QZRAS2460015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4754e6265f5fda0c715d03671efdd7a868986d947541ab839bf7deb8b38a5d1c. 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/QZRAS2460016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2683cbc3387ad1b9c04d0532537f4901930bcb2079388a3e879d40e665ee2c5d. 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/QZRAS2460017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73fe6dd529dae01352e79a3b1be787d7ef62507afb4ea3f6916058be15dfc36e. 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/QZRAS2460018.