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 0x5ecd4877057128fc919d16cfb16c2013de2e4c0ce0e8e02cd6c01eaf5845ac95. 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/a2878b0d-920e-48f7-bc80-cc025322b591.json and https://artists.proofprofile.net/proofs/artist/a2878b0d-920e-48f7-bc80-cc025322b591.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 0xbc0d8f8b4bbe2828caf8ee61c2dc7e42d20be4e255eb418507c4491f7c8febae. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/BRETD0500029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2ad34b88d499024364ed683ad0302aa2381240593bfa26e7cc79717a633ce64. 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/BRETD0500035.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd917affeb71cb3f3800db0694144dedf983f1f2dfe1e563277997c1fbd18e281. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/BRETD0500043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f29940b0b4961542e7b64bb4eed7666c3122f09482c7933abe829ec35acb7b1. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-19T23:48:11Z), 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/BRETD0500044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f3aab00022aff4804ca9a224e30d81994cf6c3fdf09dc9ef9703b0c82868f53. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/BRETD0800011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3f598d91ab0ee361e091d2f006ec1266f87b009fe45a708de2324bdc03442b4. 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/BRETD0800015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb96c96bfad7e16040b10ad01dde1b217a46df4f45f77df31e39118fab1ec1885. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/BRETD0800020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89d89e1486de65d4b560b6f5d56ddebcbc895021fbc7cf6b73c1d89c9a700b51. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/BRETD1600028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9891e9e82e3ef0d1285ba042df42a079cdfd9e056bbfc57e44aafcc38247dfc1. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:26:46Z), 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/BRETD1600029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63982172eb5bc68a889fadeb7c0dc7374532053feb7997fcb49353bfeb419c84. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/BRETD1600033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb693a76fbfc329817090c572da3e59ead87cf72eb8e8c4aeb0b09e6930b54dc. 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/BRETD1600034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc86f0f16b804a4cdc941555c24b303ae302664a19b2333d6fa288d5ab5e75a42. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/BRETD1600036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x123e926c7e699800bb23249bcab9ea1756c03502d126d7512aad38907829ecb2. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/BRETD1700023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x551c287694d289d9e40ee8270bba050ab8b109d184b72e51b2f8867be154220f. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/BRETD1700024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca2b6b570e46221f6dca2b634d681ed6233c95744a831e26068021da8ddae149. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/BRETD1700026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc21cd6f0464711e8c9aa1d78f840d16700fd76b2f86f23f8871babc203c84981. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T18:13:35Z), 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/BRETD1700032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf240f0c5541c820290e9955e3c14a44e3a4570e2c4197c0272b59b60827d21e4. 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/BRETD1800002.