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 0xa5fea5da6acd4ed5a560c74075cc8413a6da7a305de808b25d43793c9f338247. 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/51d4ba15-0013-435c-b36a-8673af1ad35a.json and https://artists.proofprofile.net/proofs/artist/51d4ba15-0013-435c-b36a-8673af1ad35a.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 0x0e79bd3c62e3c799d5975e99659a97f8e032aef1eba70f83e1dbc9ce120e83dc. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TWX351700241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x649d04238cd9ce20e76873afea7923b8d53d5590fa6857a1b19de6e965692fa9. 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/TWX351700244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x708d107d4064e5f4a81ae51badcbc1d500af49fcab6dcbb39f10adcb63d2f8a0. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TWX351700246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56caa1e2ca67d32b468ed78b057a44482e37c3d00b07bab8f54ad80586bbee67. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/HKA610402079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5eac9ef3b79e73a99ee1a2d744f22500191ff689054bf754c9a697f463f07a7. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/HKA610300743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdce7a841b64cb9f989652c0dda9b87261454d3594129fd1ab7a02eb523119700. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/TWA459024502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56caa1e2ca67d32b468ed78b057a44482e37c3d00b07bab8f54ad80586bbee67. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/HKA610402079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35bcb66070a81f7cbc700a486a248d693464320ffbd8dd3ee70566655ff14c9a. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/HKA610300744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86e72bfceb408733e0500d8b909b63774628d14cc81c938ba23cf58809a3d169. Chain 2 (Bitcoin): anchored in block 960145 (2026-07-29T21:13:37Z), 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/HKA610300745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0e63a233d37b9d05e1ad51e4aadb714321739ae20ee1f6b85ee905c522e6216. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/HKG631874022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36aa7c9bd05a450f09c5da6942aa98fd9983d5870959c76f13a24acf660da5ab. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TWA459233009.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36aa7c9bd05a450f09c5da6942aa98fd9983d5870959c76f13a24acf660da5ab. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/TWA459233009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ee240b6fd106ec215f7166d3b88b4d02a0364a3c1128685908f5c0389b912b6. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TWA459440908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4e6451fba2c4cf0bfdb3805008deebc87dfd499714ac175ef36dc3a2b79f890. 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/TWX351700242.