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 0x05eb3c07c93b151b2b288d8ae8dd178955aa57b1afc442541ba1cc96c6093668. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/eb43a7b2-5458-4d98-abf2-d0cd0f889da0.json and https://artists.proofprofile.net/proofs/artist/eb43a7b2-5458-4d98-abf2-d0cd0f889da0.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 0x529825d9c9297a039ca1476398a9e6251ef50aad0c4f51412906539679573ed5. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ES75E2405718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44ad21813a2c0159dd1b681fd33056c7bdeb5f4e906a2f69d74c22d71ec582a7. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ES75E2405721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x058983a5d89a632b7100371c41ac7f0c11fb790270419f9c82fa84648123d5a4. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ES75E2405727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d75201171f513f8b02cf5c4f7c691b9f5aa8ce69cb86e7b37a58f98ee598791. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/SE6HN2472632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0916bb5ee3a10ab20cae50fb7470e126f1eec1825b634576bd4cc5b89c293bb6. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/SE62M2302801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76a6f7e798307c2571482ca736d44b4970c970f091b6c857384e04f09fce02fc. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/BK4DA2321350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb62fdf4e09f5081b7934bf93782b3314256c5f9798b012959a5d4f5233a1455b. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/SE6XX2357308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34ed0474efc654688faec6c47acd0e5d41ab36d4a0145f06039ea9896c547a31. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/SE6HN2392030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x801a0ce64e5b3dde88dd4c2f6663be079b054cf8ff9055e6f7987fff8973425b. 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/SE6SA2217942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2635ffdeab5760f46dcc741b5b97301040e9b247ac5ea336fe65f1d8f9ebf26c. 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/TCAHS2359295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaed3ce8659edd46af7c0673725b5505b0c790b395179448a7132be52c874025e. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QMFME2312147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb3eeba9e570f92bf036c7fd564723a46d6a4e16722675d2da024131f690aefb. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/SE6QE2489653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2763e0a04964e7fdf417ee0ad393d6a0a1c75f8d1be6dfc6353c2b193865608. 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/ES75E2505290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe01594569210b01a408afb0c89a34e2c407c2a648cbecb78c880f2812e38e55b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/SE6XY2506639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdebab44ae1651618cf0449ee3060533978e34caa22ef6cbdc05d8a8d2bd5da80. 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/SE6QE2477952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14bcda52f58ae74fdd13275c31de93f6978155f0a561113a3450524dadf20580. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/SE6TI2328709.