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 0x18403ed12f502c7bdc0e20580dd7b4d41c05d1b2874ab243fff78036eae7afb8. 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/6508ebe2-390e-4db6-a563-31a3b5daa7d8.json and https://artists.proofprofile.net/proofs/artist/6508ebe2-390e-4db6-a563-31a3b5daa7d8.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 0xafea12ed3034c38b79b7b31b00fc7bd7472ead1069f8564e35f88a3696c1ec24. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/SKG771400105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8827582a6af0212c8fce27341f6e0ead9f45a928fe8b92e433bf4278290b680. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/SKG771400106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x132dc10d59257403c74fe3bca1cba4952b94fc736693b1a68f233de8008d1ea2. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-17T02:01:04Z), 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/QZN882168802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cec38b7b5a38ea711ecd6e912532ab557c003c618fefae3cf9d6611f48ad60a. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/SKG771400114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41861a9c69ac6dc8a560bb9b29369bbe1e475dfaa0fa9d16b02c14d4640233dc. 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/CZAC91800010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x995db85834352621cf161b62e7b93096a0b0d08f390777ccb8dcb65e9531e964. 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/SKG992000102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51ee01fae57e6c2bbff9e29efabac93470ca21f9613b23922adf98066d0848ff. 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/SKG152200304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4177fd1f26b256b86dbd9951f6385563b54429f53ba66fe3f62fb55c72fe3083. 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/SKG991700402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c7d8ce09758b95b2d594e21e105e076a63bb39ddf6415ecfb69a16336f73825. 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/TCADP1828687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea700b01e71479a17b0248de7e7bce51c5bc072d537e71722adc8a6c2f00a014. 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/USHM91827335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68e8e358291084cb9153c8d2bcc321217de7c426d8cbc488adf0cce34ae0d444. 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/USHM91827340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73e3e184866c431f5882728886332c53c9c379483b52e844ad43310a4e3f3eaf. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/SKC801100111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x760e2787506317340335c4fe2d7e3f820006141eaa12d120b2b239c4511032b5. 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/TCAEW2035554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ef34a101062d3bdd218b33efcb6461f0d4a187c1d640182d12471f827272f14. 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/QZN882126426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cd40d1480bea7b5b87957af7b1dd1fb26e41af7306ba2d5e3352fed56f1243a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TCADZ1834589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6ab44aec718eaa80f8c0abea18c9fe33e7eb70afd2dfe9f2da83660b107eb27. 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/SKG151700405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb665a57a7a77678f3ca65def05946a9e2092750cd488e17758d8f4a2cdbca382. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USJ3V1342000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13f8baa084f3f090b0feb6aab812a6ae442771e2474b7199239b3731500d6bbc. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/SKE741300308.
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