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 0xe8fc1168b5a8e5b353f9faa92a3566725e4e1dbd494c4f730ff5076c7aa58502. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a154ec6f-1a9b-40bf-b386-5ae1dc27d041.json and https://artists.proofprofile.net/proofs/artist/a154ec6f-1a9b-40bf-b386-5ae1dc27d041.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 0x62f8e0e477187452004b16d7e1973a6a94d65bed16a30918b479e092dd2e059d. 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/SEXUM9600101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x903376b783fe4b5d389501f538e86c025a16ec8000eac0b9dd966f72ae77d098. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/SEXUM9600102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7acfe7cc082476a127842780b1c237cf424434a0d9817293bf6b879aa9702e5. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/SEXUM9600103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2f47447d1850ad4224951464a7875c709becc8d106112a51e802d1b9bc1ea20. 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/SEXUM9600105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a988a38997d6a4d1550e9aa61dcc32caf1b901616c2f574f2388f91fa4308cf. Chain 2 (Bitcoin): anchored in block 957583 (2026-07-11T15:53:17Z), 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/SEXUM9800101.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e87752acdf618afea184c1d5a2b9b936db0ea4a26434dfd420387a402743d5b. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/SEWFO1000517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf6a9475b7097aa94425901c2ada5060cccfa2d0dbd91d948bc54d0d90c08726. 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/SEWFO1000502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1877270071cb6f0909a27d3ca0c04ebcabfbddaf7621dd2c37beb9be6af35ba7. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:24:39Z), 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/SEWFO1000507.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10fd4c58725fb8fff19284346e25489e4fa49567fecb2eae8646cc6eb1ec2667. 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/SEWFO1400304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fbaf938d7c49d6f349ff48acd7b0477b6d796641cca390b5e85f6d0d7309d2d. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T01:39:34Z), 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/SEWFO1400306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x659b29c90f158916d5ac29c1ea8c826f85cb17a87ce67dffc4858d6374a1bb9b. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/SE6CC2000103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc6af9770d57c6194473eb3347c322fd794d2fdd403ad62074dc9d9774a15822. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-17T00:17:37Z), 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/SE6CC2400301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa256103137005ee1110d09d5744739fbfa1d80967e024601eef63e056795c676. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:52:27Z), 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/SE6CC2400201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78ff449ab4d2ce0930ed97354ef76e6e8ccfe31bf8d6c5cfe21c45a87ab43543. 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/SE6CC2300301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x554bc720fbfa965dce9c3cfe47c808a94f57e55c06b049a11fef593ac47e59b3. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/SE6CC2400101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x418d49067ca994f99e0cc2fc39d8708de3f8773520c6018fb51ddaa48122225c. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T23:01:17Z), 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/SE6CC2300201.