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 0x4e4d8f5505ac704c16fad8078feda3365393684cd26d07b7276346235981ce6c. 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/2880d984-8bd3-4f37-9695-2b523e177289.json and https://artists.proofprofile.net/proofs/artist/2880d984-8bd3-4f37-9695-2b523e177289.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 0x2a7efc790ca7e2d05c44be15849c252ccfeea01d4cd3808769ebc9c6f347b04e. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:00:57Z), 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/SE5Q51700422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f8a21d86399a0ca61152d49746062a9896b748642f60e5543659120b9f83bb3. 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/SE5Q51700416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdfbb2d7681526fcfb88db43dddaa0fe30bb6b0a8d34972326cabe8e0fb97bae. 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/SE5Q51700418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc8e6beae7d591f7fb21a83865158bc41f2d4642b5ce72e34ce7be2681d254bb. 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/SE5Q51700419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91d46b8a93bed2d595066f5a4623651f2d1396a96682e5857e3e20b266aa4a2f. 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/SE5Q51700437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20581e48789f1040ec7a40726f146c262c2fbb0ffc476fd51ce9500e5c7a9e57. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/SE5Q51700439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6008ec7590bea494f800f77adc3ef1c8b7ba2683582d3c174f53dee4561a153f. 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/SE5Q51700848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16e3f58183cb7852706220c28ca41bd97fd4d1618e7c44019e9b780e8b5d582e. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/SE5Q51808776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38839b47fe229ad5b977a00940269f9a53800c3bb6b01fcc39f3209f51f5bfbf. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-16T00:05:24Z), 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/SE5Q51826034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x083e8c7f391f5f60d520fe6f9f3b9961c540a6a1243fb626188ca6626dd17647. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:01:08Z), 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/SE5Q51822346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25a9c2710ab318f3c805d0011c0244170b71e94ee1138b112e1f18733d1ecd81. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/SE5Q51903577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x009e31d1a0cacf2c49d3b641bab5d5f94f8b81fa2afbdc81e4343e8a7dcf9051. 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/SE5Q52002015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e6b7181aa8175da644bb776d947ace718c1aa4e91628a442c3e9352dee780cc. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/SE5Q52200907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9a6aabd2199cf30103379624b0e685549cbd9e28b16b156dca0183aff39ff39. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/SE5Q52202129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x797685bea97301ebc98d09f0cd991e6704729c536d23765effb81562bfd41627. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/SE5Q52204162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3558c7d89beece7bfd2fd39a6662e6b6277360ecf1dbb44ffef9014275857aaf. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/SE5Q52301090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef69f826e6a5a7d8e72b9db25098379306aa683242bade6f06dcdfea9e301f5f. 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/SE5Q52302997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8de746f484eb3a63306064fc18f9f547226f54746ec3273d932b40da0b017c64. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/SE5Q52303389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47a6440353a5d8514f147b495d82087c0a9b7eacebf49632002f98c220f5dbdc. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/SE5Q52401257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c12944a52c20605fe42e1565d2c44f3140b6c1fcda01caee2f7797f3acbe20b. 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/SE5Q52304595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5561d371b540758c6f7e8c56a7724605f0734f46dda31ee91b727bfd911e4ec2. 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/SE5Q52304597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9abc641afe8657ac00b3e02ee9d32cc68b744bbc866a3d75c3e7b8c250d0ccc. 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/SE5Q52304604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6adc226987e95d1d100483b7799f8a66a476dd376e5cc1765b52ac8f9972aa37. 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/SE5Q52304596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16ea522d31ce35c139d7d36c3a1a617d4fc4f3f2d89d79b1bc51b45e872950ff. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/SE5Q52304609.
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 0xb247d3ff710b278b91cab9b7853ff08116e058b2cfabce8df50a2cae7edda02d. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/SE5Q52304606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86587c018147f1938490de1ddc14b88dc101a68853deff3148794cfba9e058f3. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/SE5Q52304602.