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 0x551247974996c4e4b52fbd162fa78756bdc9a308c175b3ff8e6fc7056b340f6f. 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/28fcf153-3d5b-4217-93bd-6f57b50bf560.json and https://artists.proofprofile.net/proofs/artist/28fcf153-3d5b-4217-93bd-6f57b50bf560.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 0x09b0cd01ae96f695abd4b4578ddd40ebdec338d77026a2a5720a556aca45d962. 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/TCADW1860778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38ae5d56415dc40fe82039fbffe3a990ba5a879c2a9991e757d589fcf2c119e5. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/TCAEI1944385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1b9dcbf55b0b32b40c0e9b17156a96192b4374ca492fc6260838e641917aed0. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/QM4TX2231783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02cc3be79d6714d706f00c3a42dda7a5caf8499b74c9dac1f9f0da998cee69cc. 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/QM4TW2286584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dc4858875875e062db86a358ee8eb310a0e56847ddf9fff263488aea26df038. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/QM4TW2286602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf84771e4bab8ea52cbc4566378bf969ef9b2dfac0a4be947d86f03e162f4ba1f. 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/QM4TX2232324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e5542ac0c9117e28d7c9b812d9ecdab4c02b6568c3c32c29015d174f9dc8cfb. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QM4TX2243548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2af889dea152e6c79ca3a37de500383a34a5356869a6f583aed99250e44836f1. 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/QZGLM2366406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x239736bcec8d8bae8479b1871a63b14bbe84e72314f1b5683921778714bac648. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/QZNJY2394745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b6f36337f19fb494499746f85ff30b9de7b18c20d4e76c68b00cb8831bff45d. 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/QZ5AB2448047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf9e7d9ebee072466f8e31138291bd169700d89826b7316ddfd9f086b136f245. 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/QZGLM2499431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe09f83d68310b98f30a557bdcf29f7e1f6d9789c20328d298a472b3dc107b42. 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/QZMZ92493246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1a5b070281e1c1d0ec2224ff7d158a17e67f703d4570cd05e44ac5b127ceac6. 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/QZTPX2419607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x121413f454eaa3597368cc25764730b96df728e618fab4aaccbd2478d75c1dcc. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZTVM2453870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70ed16b1c74580d79712b422f77994c954427d3a81fc0da86e89b1c89b5820dd. 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/QZW9L2495422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d19520778dbc373cb91efc881c9d3127d48e2f7f7355be76f8c6a33a30223c0. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/US7VG2558029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2af889dea152e6c79ca3a37de500383a34a5356869a6f583aed99250e44836f1. 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/QZGLM2366406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x121413f454eaa3597368cc25764730b96df728e618fab4aaccbd2478d75c1dcc. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/QZTVM2453870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x107c8f5d93df030e5e80f97d834f65d6b6db66389036a8ab72a44a65e092dd2f. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZNJV2326561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf9e7d9ebee072466f8e31138291bd169700d89826b7316ddfd9f086b136f245. 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/QZGLM2499431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x239736bcec8d8bae8479b1871a63b14bbe84e72314f1b5683921778714bac648. Chain 2 (Bitcoin): anchored in block 959013 (2026-07-21T13:39:11Z), 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/QZNJY2394745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdae2e8c44a6f25610f85d61fcd76d992cb3d45f35f0eaccb21a98af9dde2ef9e. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QZGLS2536052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1a5b070281e1c1d0ec2224ff7d158a17e67f703d4570cd05e44ac5b127ceac6. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZTPX2419607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf22f844f51cad431b88319158ba0e82f3b699ba40ca3be79d5383a826afa83fe. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QZNJX2437450.