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 0x7fab21ac129c053b3937f5ac9fd0cf5f46379f7c13ef9299191d284ca0b03682. 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/834617dc-3a18-4f76-a77a-ac9bfde3a212.json and https://artists.proofprofile.net/proofs/artist/834617dc-3a18-4f76-a77a-ac9bfde3a212.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 0x990667f09207f33ddf41b8c3402245226f22b38541e0bbcdf0712315cdf312ae. 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/QZFYZ2020853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4253f5585e0ea032755ade6e2074aa4b14dfa0c03b23fc4cbdbf46215fc9ff7. 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/QZFYY2231281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89ab8a4017a4e1813dbfba32d67548725f682ab8a952b0bef85bbbcb6ee7574a. 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/QZFYY2231282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ca4efa0e0099e05b16ba8efa9891db3c79676c3a0e4376b27c80c0132ac0959. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/QZFYY2231283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19cb37c51b64b403f0adcd0d59afceb8a89f770ed1f06c6deb9aa74d0bc3eb6c. Chain 2 (Bitcoin): anchored in block 960330 (2026-07-31T00:58:21Z), 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/QZFYY2231285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x989db4a5994471074f545448cba4f6380fe7dd94418f4b890fdac9f14b123d19. 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/QZFYY2231286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d8ed3898977baa0626a8360f047445344e3cd265192c9243d208a0492f6e4aa. 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/QZFYY2231287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7ab6455c37fb7c02713cf29f168bd1e8e5b99d6dbd5c04eddaeac19c977c80d. 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/QZFYY2231288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f88d791494c99fee2e07ccc82e25d7a26ac3ea0b4d7cfd6f33a5d7af0f93177. 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/QZFYY2231290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f2a9efc8e3dc1fa3412ee0f21f43fa596194c5879bbe8713635791847dce10e. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/QZFYY2231291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6f74468d791db711ed14c03eefb296bfed73b64b74151f92c3dc67f1ca4e7fe. 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/QZFYY2231296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f67d5e5e4910ec02526c6f7853655842c010d484793e56a84a7785a23a93d51. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QZVM32200056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd125de8a187dee9bc50a7a07d8021664cb8523e7e2ed3251ec57b20226090234. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/QZVM32200057.
King of the Hill (feat. DavidTheTragic and Tony Shhnow)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a8ddae5dbb4187d1d7663e2fe3ee6d290a362bd42d03d037d748f3902dc6478. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZVM32200060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45c4190e9f37f54a8fae70e041a7450363f988a858ec855376ad79e48d55dfab. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/QZVM32200062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e481cb4b2467f8b243f378ed553bae44f954ee0b5213811f077878cbde805de. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZVM32200063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e9127c77ba3cecff55f949e226d18e19b144676eea768e98d3ebb9b8ed96670. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZVM32200064.
The Freestyle (feat. Bear1Boss and Duwap Kaine)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa18a6e8490ef40cbd60667ae9ce780a362b85cdc831ef18c985e2ec08a8a9fc4. 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/QZVM32200066.
Duck Unlimited (feat. Bear1Boss and Nolanberollin)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ae9580fd54dbd705d1daba82837dc89a7604a3f5e90c6fbd9b8656395e41b79. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/QZVM32200067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x144a9eed282aadfa0c55dc6d90373c9fa47cb85ee90d469af1e608c3161afe89. 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/QZVM32200068.
Wholesome Dreams (feat. burgun4y!, MuddyMya, and Jelani Imani)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x827ea6ccbb38cdfbf673d52413a3ebad6b7a78e577031b8e1160e68b8769b7f1. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZVM32200069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x103cbe15284f27bbdcb1d28aeaf2db420c902435e6f32662daf8113d2964500e. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/QZVM32200071.
Porch (feat. Bear1Boss and Tennisboywill)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd010d07c261071b7ecd8da923b3bbfb5ae39f9f0d6569376f06303679076ce93. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZVM32200072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6795bf56152efa4009321aeb2556dc19dfaa7f435aaff4ad3a462d91c8e42c8. 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/QZVM32200328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76982d2d483394099431acb5bf44fec505a64b5f300532f0d2de9416879b417e. 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/QZVM32200323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3eaab7ceacd7d6a16f2da772d8b2669a9ffbc1a747a975fe55b58e2805532cc. 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/QZVM32200322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe329cdcc7abfc230eec910d5c40f1705417c5301ef7998f8c3fe389e2a8d92e. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/QZVM32200324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee3bfee61ce9bc258cfc9805d7cb9871001d1a242f3c48c3ae39bd482f4684c0. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QZVM32200325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca59021be6a2c188800ed8cd8a3653ba6ac8e88f973b6768c125350893a32b05. 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/QZVM32200326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a9d2f9b34508e46c3d8845369a6445705640eecc7b727b8b8f528cf56de4118. 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/QZVM32200327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6795bf56152efa4009321aeb2556dc19dfaa7f435aaff4ad3a462d91c8e42c8. 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/QZVM32200328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9257ddbd5400277b153ec9c507fb9e24de5f084207ddb0e3917f01ce799beaf. 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/QZVM32200329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa42a1e1cf088ddd3d6b830a24e6cd5837164e284b34f77a27445f7eecb73c0bf. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/QZVM32200330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc69d6b001b2854fc006900a33f69151d3908afb97a7530f513e48ab79b62352. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/QZVM32200331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe39b7f13ce0a07726df0ff64d64d728d00ce1fe3e887c0a011b16fafa7a150ce. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QZNWP2350549.