thumb|A free party in 2003 thumb|Pasquatek 2009 A free party is a party "free" from the restrictions of the legal club scene, similar to the free festival movement. It typically involves a sound syst
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 0x4b0287f2742e620be097d4aa1947d74248295dd3ec58bd0ab413214dcfec37c3. 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/5af96ceb-c734-44da-8d11-8314b22a1ce1.json and https://artists.proofprofile.net/proofs/artist/5af96ceb-c734-44da-8d11-8314b22a1ce1.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 0x859fb5d9f60755cf024dfb7e642d4263f6443f4561f92855e2ed026473012e49. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZLBC2100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8f94e9b8c718ebbbbd3b7f36df93976ad20dc3a9849989cb9a9d746993bd03c. 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/QZLBC2100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x052a9aec51b117376dc1c710d5f44d66a7c7b4ffbbac442cfd6ca1827a78f02c. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZLBC2100012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4135d084cb6b75b85d222b2ad3fcf4654685253ae831a6821bc17e60db003ba2. 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/QZLBC2100013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31941ee1f7510b9fca1ad587229af20e2bab6d8d671705466d63a8c102b991b3. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZLBC2100014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe97e0eb9500137507ee496c0fe5df2f1fe961d6c6ba28fc478f08ca14d149044. 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/QZLBC2100015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fcdb98d6abfb3e5e1a8a66d704fa1d84303e15f4a92c81f68a79da5668cfb28. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZLBC2100016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x313e370e0d3a3199ad5ac037089a606ba86d7b5bf918084af3a72d68d7f27ad2. 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/QZFYX1929632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5b877a7918a6e1f632f251eb956449b37149b75f44055c1a657981024ada21b. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZFYX1929633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c8b30748b1768f35f51c522783a589df7b39472151939149aa8eac8a45d0f70. 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/QZFYX1929634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47b9bb4f4ad45bcfc2e2c91b0a0af67548efa9269c82fb6783be67d440ed8be1. 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/QZFYX1929635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x297ace7010cdb6766b49ffced10874ac3a8c5b10994dc91ccd3503497b38a967. 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/QZFYX1929636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf39095cfb1abf4f5bb3304a485215520bd7c49cb6f630b76a5c4d223eb9ab961. 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/QZFYX1929637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x753f1ed7276da4c44addfe581aacc24b44eec6b2505a77b53a2d53a0195a5c82. 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/QZFYX1929638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70d21f1d496495e31fc54eec173ea09dc1f2f3328f29c544926a091717ebc95f. 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/QZFYX1929639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd78d3f0b2a042cb4b54193335278c50b9f2562238b3a9e500801b15096b6c446. 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/QZFYX1929640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96ecb809301aeaed09fc39dd1f2c3423253ed24f6fac6ef790df401abb5a5d60. 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/QZFYX1929641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f6b9202d28d3376f9eff322b23f83e4b15b423c7c336be402a89e769d4e023a. 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/QZFYX1929642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd61ec9a76754070f614a80f380f9506e6b35481bdd271b66461d6c71cdc3194. 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/QZLBC2326898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f9fb1699e8baf02e0fd99c8bba29b9ae5f0c0212d044ed01d45d7fc3fe71d56. 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/QZLBC2200757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc10f003394ecaba407c967cff58fa2ad7b5834078f355c26b4ebedd54db7722c. 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/QZLBC2200254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aa7f0911d78bc87b22b080cd25dcf670502b347de0bb04df6f3df1d5374ac2a. 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/QZLBC2200759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe49149c7d6c330b552f5e9cbb70bc6c3c3f5a6f94be4ae6eb4b578c9db1d3064. 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/QZLBC2200760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc10f003394ecaba407c967cff58fa2ad7b5834078f355c26b4ebedd54db7722c. 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/QZLBC2200254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x535600492598041411d408c3523fd5f9c49ae2baba5e1d70ba73d94ed2af1438. 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/QZLBC2100314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x738502e0d0b78787b8a3e8cbef5e5cdf6373a0093b3ca861a53f0b2d97919704. 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/QZLBC2100315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a9508e22851638a6021c44f8afe73d301f87c176b6b3a8fd66a3b62ab2b2206. 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/QZLBC2100316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4135d084cb6b75b85d222b2ad3fcf4654685253ae831a6821bc17e60db003ba2. 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/QZLBC2100013.