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 0x4078eff21faeb0024d5d5df83db5143a6854defad6c4daa51ad79d22960ed881. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a617df11-d19d-4471-a997-cd89545667ff.json and https://artists.proofprofile.net/proofs/artist/a617df11-d19d-4471-a997-cd89545667ff.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 0xc1bc5dde1aea3773b0c6ca1a8d1f049766ceccdd546b06c444bd1e09699947ca. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/INN242109707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8e3d036e6c3ba1d9e18c95ffe73be8063af254b9fca6b5e3080bb46369e8e5c. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:43:36Z), 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/INH512007326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53f92aeeac9db6989d7d697c44aa45839e5235ddf8f6126f0f6c0b0004b0d972. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-17T00:12:24Z), 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/TCAGL2269866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7058417e33e65541ec1214e4f0f862e88ab63e3e94107ef7d3b2209337f654e. 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/INH512012748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aa1893bf756fc3a104e7d6b83f560b7119ca8176842ee2c4b418fe2584c231d. 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/INZ031413116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf518117768262b1d5010c2dddf530b31dcde544440d81ed9c40821491e8f5c48. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T21:45:30Z), 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/DGA092318949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9190552052efb09888ae85e500011fb5c7e61b9250e62c54a98b3d5e9761ea97. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/INR822319220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5157fdcbbabf877fdf9baac0246124037407e42c5c8fa505ec90f65a02c7e7c. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T23:06:03Z), 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/INH512018001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4e83bebd9b81485d6e113f9483aedb722cfab80bcda030338df093401ce8702. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/INH412402338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x971ce71727cd28c43353a0d0a221a9f3867bc335efdab40880f2b8a7ebb1f2dc. Chain 2 (Bitcoin): anchored in block 956748 (2026-07-05T05:55:59Z), 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/INA792400146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1439275b0cc57c82aafd15523ece4e2228d81054eb78096979ab1651421e111. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/USHM82461919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x990375ecf7ccd881925fe78d37009dfa7fc00d3df26c5f97ad6c3af21d07f9c8. Chain 2 (Bitcoin): anchored in block 958130 (2026-07-15T11:21:17Z), 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/IND832308037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16030b079773ef1c4ea04ebf6ec15177c99a2f4f1f5145ff2f3a5ad20a20d8e7. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/INH512025276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x223f46df3e5a462e5e7d3fc46a5fe91291288ea20bde3578f267fbd81062ed19. 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/INP1L2400045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x785ee2789228625d9965894c1c7ea3d79d0a886cbb6326fda7cf564027d1f2ff. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/INB982502526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc75da52c55a0140e8df2feadf150fd6ab5ebeaf0ebac6a80adc4ee8e98c8665b. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/FR96X2537863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4347a28957ea1cc6b721fc4363376d8d65fc8a9b42fcdfc934aeedc46e8c6e4. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/FR96X2545869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b8338f15b95215369d267ce550a372b0800018fa35bd88e8e3c1d2d46fcc812. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/INH512029328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde041579763f1215b8e890d22a3a60a8c783517055c5aba03f43df2226a566de. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/TCAJS2598667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3445e19472adec1a223720221daeade934516441cd5b17db313a709b64bf85a3. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/FRX762587713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd463c5b2b5526eface60f2473a51f5e610635fcba5c84992cf2233b9fad6041f. 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/DGA052528239.