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 0xe325cc20caeede1f0cd3235fc2d05a009ee7b9377e22bb3b11e58cc90aaba251. 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/3a9b6559-8313-4092-ad12-ce8adc2f08b5.json and https://artists.proofprofile.net/proofs/artist/3a9b6559-8313-4092-ad12-ce8adc2f08b5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Begin De Dag Met Een Dansje (karaoke-versie)
Bekende Nederlandse Kinderliedjes Deel 1 Zonder Zang (instrumentaal)
Bekende Nederlandse Kinderliedjes Deel 1 Met Zang
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 0x58ab183fec576ead3e370b0eaa5d6368a8be3561b07ecceb0799445971fb94e0. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/NLH729500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0093f2062f209aa22b923e20e804dfcfa550fc2ab2007cb10b9fcfbd8f9de94e. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:40:57Z), 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/NLH729500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77a750fbdec952f2763eb508b34ae5a3a8ced39101cfba883703f333c26d6774. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/NLH729500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5d94f51d413b6875d64e1a48fbbf1af21666b33c9214f71411189eaa61a6600. 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/NLH729500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce1cd5717fec0ec339e1517b0fa57db7ea523b09c2a708db3fd3a7c9ff0ee36d. 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/NLH729500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc06826b7970f21d0f2c6a59402e4ce3360bf273cdb653b768841b45363100c0e. 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/NLH729500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde23f23745afd5835d017bce63e44ea1159adb50a7aa7053fc9a54f8beb3d5f1. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/NLH729500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb263095c8dedf57c6db8b22c27e82db2e126f1876079917e7e26e9b9d07469d4. 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/NLH729500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca6ded75dfc1cf37ae9e7be35ef90e509f4a556ef68491ad8950899f41b81a06. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/NLH729500011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaa5ea5a65446ae8ed893b44fed5ac88f6ae58f0309e1af79fbb92deb03694ef. 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/NLH729500017.
Bekende Nederlandse Kinderliedjes Deel 3 Met Zang
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21e3209451081c5c71b461bc9ff8d3dcf4d5a81b54e177bb511e75a8c45741b1. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/NLH729900119.
Bekende Nederlandse Kinderliedjes Deel 3 Zonder Zang (instrumentaal)
Bekende Nederlandse Kinderliedjes Deel 2 Zonder Zang (instrumentaal)
Bekende Nederlandse Kinderliedjes Deel 2 Met Zang
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a9561899190f9e44b5f3ac52d225d502e349950512df91b6c001f47352d4034. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T12:51:21Z), 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/NLH729500022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f9ed248d7b9f9ff9dd7c508546614b921814ae7893b62204f3c93067ca4d102. 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/NLH729500027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd15a941b3f6509b3f5825ff52d7388ad81ba985eb76b9634d13f68b49325310a. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/NLH729900027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc33ef5a89d23e336a4a1c31b123515fda4e54038b0aa97eab3070ec66a525f02. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/NLH729700001.
Bekende Franse Kinderliedjes Zonder Zang
Begin De Dag Met Een Dansje Alle Versies
Bekende Duitse Kinderliedjes Zonder Zang (instrumental)
Bekende Engelse Kinderliedjes Zonder Zang (Instrumental)
Verjaardagsliedjes Spelletjes, Speelliedjes En Dansjes
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14a1c4e9cc3348cdf60404f31d328a09034859c28f4268c82a19f62be9b4e88b. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/NLH729900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7521a6286f5ed1d15a37343da6d8b824ea193bf087ebe707c6a9a7c5b99b975. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/NLH729900006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1df5928df095f3334ec03287ae905317c7ec7a7d035a2f6f6c78c35c62f0e9c. 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/NLH729900007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x349d018cbcc23ca8831ef23d377605b80c5453f88ba005c981c6fa633279302c. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/NLH729900008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefb45aa3e82a2423d07838c1d7ce8549d0357313c86424123bd4776c381c4f1a. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/NLH729900009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbce445b9c635245f5510f4f434fddfd1587c0d2193583477087b90ee7e4df47. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/NLH729900010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35f7a1aca1c827f021488d2a509f5cf37dd5a28e140a33f7654c6a63f7160f0d. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/NLH729900011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x711db19ebe6a844d03d223836ba10489c268cf64ce1f3dc2f07df7b89399484c. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/NLH729900012.
Uit Artis Is Een Beer Ontsnapt Zonder Zang (instrumentaal)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc69e46a0ba7bd08a2bf789763c175ca50daba63954b19cf3b2ae34b76be030f1. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/NLH729900041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde08c05fd9d831b6a8143d6f2fc7725796d05eb2a5be1784d037a00d1a38510e. 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/NLH729900066.