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 0x8d3adfd20d4c6c0d435530f0e6792877c00bd98a14d0753735457427295491ac. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/261e70e5-ac9a-4820-baf7-7650c29f4b7e.json and https://artists.proofprofile.net/proofs/artist/261e70e5-ac9a-4820-baf7-7650c29f4b7e.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 0x930306db9fa7583d5576157244f83ccaf3ec091158205c77de75189d8b26055d. 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/QZPJ32507195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ad67e82e545e1d0e317b06650cc005a1a561a73afe6a0f88e667a534d0b2fa1. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZPJ32507196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb7cd1bf70dd927487f862a68ebb86f6910200b16d83793ab06644a7b3ceef59. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZPJ32507197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba2c6f8851dbcae46ba756b639f312fe89befb6a3048f23efce2d49255981852. 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/QZPJ32507198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ac8ca603e0f38ca747b1ba85f846bdb8e789a1c3c0c2ddb8560b848c5e94597. 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/QZPJ32507199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0a5040303093bf591063957b689f3c14a8f5349106f474a5ad4a7c7fd0572fe. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/QZPJ32507200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66fda5e0b4b5c558899f555e518feabebfae41bf155e5986bd0cfec465c4b30f. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZPJ32507201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90d979b6e7aa47285663e1127c364372a874256ac870dd7618967e048f23f5e6. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZPJ32507202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8ce493964bdef40937d32492c09273c6704e9e53d12730265f1fca66b85b37b. 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/QZPJ32507203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa759772d223ae2484486a90008284248d0f9aa375b782d420792d1f28ecf7352. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZPJ32507204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd2eef7a9609cf53cee764347f522dcbca32b69beffa24d47fc6cf69001b0f1c. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZPJ32507205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eb28e2e2c7822ca0dee73d992831b1f807649deda3744f15b1158ef9d434f6c. 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/QZPJ32507206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fa7257152caf4db51e527d1b10b5e634864eab4567c3e98567c90968f20e73c. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZPJ32507207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe214ef2f7792828f5a9353dbae193a5631c8c6d3535e8de3c49421ede1ed130. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZPJ32507208.