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 0x21c1612e56bdb9f5f265bf4320d937b0c797296aeb777387b71dc1f7de9710d3. 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/3edd30c9-5c7b-439a-ae1c-ca9a1f7d6f3c.json and https://artists.proofprofile.net/proofs/artist/3edd30c9-5c7b-439a-ae1c-ca9a1f7d6f3c.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 0x851e8a4161f49f814b4135c054da301398e0d18e963b43ea94e5bd04ec960cb3. Chain 2 (Bitcoin): anchored in block 957699 (2026-07-12T11:51:06Z), 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/TR1641100091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x162caa5f5dacab10996b15d3eb08b41416c7486b98fe37eac7c575837097e078. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-17T03:24:12Z), 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/TR1641100094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce31cdb7719be9c714bfb8e2b8c771deb931c574db4c541085cf63ddda97cfd1. 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/TR6061000071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef7359872e70883d46ccc342a1febd6aeab504f55a79fd42cfdcc2e25e01d53d. 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/TR6061000073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f0704c1e1212960f8608e8bff16c3a19c9fa705466a9e3b4ad52e9143f44195. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T15:09:49Z), 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/TR6061000117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1019e966bb353a32b86f6bcc933a1e2507748853d71ef035ee5f1b5a9b94c177. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/TR6061000124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec20fa27a5992129033c4ea8782cb1fc6898a1043ccc003e8bb94ee12667c9ee. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/TR6061000125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff72c8049549c59edc96a78e2f85989f9089fdf9077fc8c61442b9fcc97ba8a4. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/TR6061000147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebe29076d8e6f2c3445e7697d1495c88fd71b2a63de87071da31b001a78c108d. 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/TR6061000156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf843ae915fd783aada6c4caa66ac1c965409e2358fdb3c6d2db7682003fd9e67. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:23:09Z), 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/TR6061000163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9ff7d5edf20969bb0ba96e10e660fabf8c362629e937e8f567078dba9a4b238. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/TR6061000175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9f1aa10c6449dcdd85fc47e77b89a7b3001001b113de6734ca3eb0a2f4c36fb. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/TR6061000179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6444518462ce83574c8fcace8dab8c7902f5a1dbd4313ce331e16d5e37a89545. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TR6061000180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4376dd8606c72e7f8756111627bac6f06b0f7c0c54873369c51d45965ec7105. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/TR6061000183.
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