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 0x60b45be5b1efffd9e33c3810b66794d70616596b89164bb79ef11cd0b5f208d8. 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/cc6c5563-a8cb-4809-8aa8-7438a0f5d3a1.json and https://artists.proofprofile.net/proofs/artist/cc6c5563-a8cb-4809-8aa8-7438a0f5d3a1.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 0x242eff0780705999aadcf669cc76e89138d478ab1aa796356c6b4a86d9ef4ade. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZZ792577178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5ed18a6fa903bb8a91a46a71ab7e42f0b71bdeb9f760c03df568e0af17ca13b. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZZ792577179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x087f8bfff3a1414771c5b735b9b32882417079ca08516109f51ac0b9fda50ebf. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:27:56Z), 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/QZZ792577181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f7b02feb2d960d5e4197dc103e99a99261849cece2984a20dda68509eb08770. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T03:53:12Z), 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/QZDA82216199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cf35ce29039cc7368cbbde2ef94f5a01078c58f7fa13743a494ebf9a91cbef3. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/QZDA82216201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x623a49de21f6f731f41e963049429a66a198f6cab32b2330bd876940a6882dab. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/QZDA82216206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x524bb149acadddabdd9440f443df569432b68d43be2ec2429523c5b5531f039b. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZDA82216200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cf35ce29039cc7368cbbde2ef94f5a01078c58f7fa13743a494ebf9a91cbef3. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZDA82216201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6858a95e8ad8a5d54a11819fc977afbb28931ffba74a6662f5fa715954572aee. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZDA82216202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2ca5def779f18af63f894879ad50f49a8ec182965a8e1533de5da8f8b66580c. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZDA82216203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52d0631aafcec57bcf4eb9c0065f307f8348be9e68f4cfd5520d80108b5ca8ad. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:46:19Z), 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/QZDA82216204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x654e042f3d1093bdac33c74c2cbb95f94191a5d7b80494a64ff7e7201406950e. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZDA82216205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b36009a1ec0c257474cffcdbe94869d2ddc90f14700676ed4609f5989f7d420. Chain 2 (Bitcoin): anchored in block 958658 (2026-07-19T04:09:09Z), 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/QZDA82216207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c9cdd1719ccf02ae2e373c68784abc2c96c7e7f45fbb42618ad430ced41c74d. 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/QT3EX2583030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c9cdd1719ccf02ae2e373c68784abc2c96c7e7f45fbb42618ad430ced41c74d. 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/QT3EX2583030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f44997463f339905bc4e52c598f01607ddeb54ed43b4a1c1d643cfca22d0dac. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QT3EX2583031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x546034a2b95409c07ff7530c5e403d2da0366950e96c263424003413a08ee676. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QT62U2529772.